New CarrierMessagingService API for sms filtering

Add a new sms filtering method to let the carrier app tell
the platform to keep the message while keep it invisible to
the end user.

BUG: 27292180
Change-Id: I306a7dbde6dcb9929e358b3d1bbda9807ef35943
diff --git a/api/current.txt b/api/current.txt
index 55e81a3..8615f02 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -34239,7 +34239,8 @@
     ctor public CarrierMessagingService();
     method public android.os.IBinder onBind(android.content.Intent);
     method public void onDownloadMms(android.net.Uri, int, android.net.Uri, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Integer>);
-    method public void onFilterSms(android.service.carrier.MessagePdu, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Boolean>);
+    method public deprecated void onFilterSms(android.service.carrier.MessagePdu, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Boolean>);
+    method public void onReceiveTextSms(android.service.carrier.MessagePdu, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Integer>);
     method public deprecated void onSendDataSms(byte[], int, java.lang.String, int, android.service.carrier.CarrierMessagingService.ResultCallback<android.service.carrier.CarrierMessagingService.SendSmsResult>);
     method public void onSendDataSms(byte[], int, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<android.service.carrier.CarrierMessagingService.SendSmsResult>);
     method public void onSendMms(android.net.Uri, int, android.net.Uri, android.service.carrier.CarrierMessagingService.ResultCallback<android.service.carrier.CarrierMessagingService.SendMmsResult>);
@@ -34250,6 +34251,9 @@
     field public static final int DOWNLOAD_STATUS_ERROR = 2; // 0x2
     field public static final int DOWNLOAD_STATUS_OK = 0; // 0x0
     field public static final int DOWNLOAD_STATUS_RETRY_ON_CARRIER_NETWORK = 1; // 0x1
+    field public static final int RECEIVE_OPTIONS_DEFAULT = 0; // 0x0
+    field public static final int RECEIVE_OPTIONS_DROP = 1; // 0x1
+    field public static final int RECEIVE_OPTIONS_SKIP_NOTIFY_WHEN_CREDENTIAL_ENCRYPTED_STORAGE_UNAVAILABLE = 2; // 0x2
     field public static final int SEND_FLAG_REQUEST_DELIVERY_STATUS = 1; // 0x1
     field public static final int SEND_STATUS_ERROR = 2; // 0x2
     field public static final int SEND_STATUS_OK = 0; // 0x0
diff --git a/api/system-current.txt b/api/system-current.txt
index e9d47be..b0a372a 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -36730,7 +36730,8 @@
     ctor public CarrierMessagingService();
     method public android.os.IBinder onBind(android.content.Intent);
     method public void onDownloadMms(android.net.Uri, int, android.net.Uri, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Integer>);
-    method public void onFilterSms(android.service.carrier.MessagePdu, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Boolean>);
+    method public deprecated void onFilterSms(android.service.carrier.MessagePdu, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Boolean>);
+    method public void onReceiveTextSms(android.service.carrier.MessagePdu, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Integer>);
     method public deprecated void onSendDataSms(byte[], int, java.lang.String, int, android.service.carrier.CarrierMessagingService.ResultCallback<android.service.carrier.CarrierMessagingService.SendSmsResult>);
     method public void onSendDataSms(byte[], int, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<android.service.carrier.CarrierMessagingService.SendSmsResult>);
     method public void onSendMms(android.net.Uri, int, android.net.Uri, android.service.carrier.CarrierMessagingService.ResultCallback<android.service.carrier.CarrierMessagingService.SendMmsResult>);
@@ -36741,6 +36742,9 @@
     field public static final int DOWNLOAD_STATUS_ERROR = 2; // 0x2
     field public static final int DOWNLOAD_STATUS_OK = 0; // 0x0
     field public static final int DOWNLOAD_STATUS_RETRY_ON_CARRIER_NETWORK = 1; // 0x1
+    field public static final int RECEIVE_OPTIONS_DEFAULT = 0; // 0x0
+    field public static final int RECEIVE_OPTIONS_DROP = 1; // 0x1
+    field public static final int RECEIVE_OPTIONS_SKIP_NOTIFY_WHEN_CREDENTIAL_ENCRYPTED_STORAGE_UNAVAILABLE = 2; // 0x2
     field public static final int SEND_FLAG_REQUEST_DELIVERY_STATUS = 1; // 0x1
     field public static final int SEND_STATUS_ERROR = 2; // 0x2
     field public static final int SEND_STATUS_OK = 0; // 0x0
diff --git a/api/test-current.txt b/api/test-current.txt
index 31fc5f7..d1be531 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -34254,7 +34254,8 @@
     ctor public CarrierMessagingService();
     method public android.os.IBinder onBind(android.content.Intent);
     method public void onDownloadMms(android.net.Uri, int, android.net.Uri, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Integer>);
-    method public void onFilterSms(android.service.carrier.MessagePdu, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Boolean>);
+    method public deprecated void onFilterSms(android.service.carrier.MessagePdu, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Boolean>);
+    method public void onReceiveTextSms(android.service.carrier.MessagePdu, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<java.lang.Integer>);
     method public deprecated void onSendDataSms(byte[], int, java.lang.String, int, android.service.carrier.CarrierMessagingService.ResultCallback<android.service.carrier.CarrierMessagingService.SendSmsResult>);
     method public void onSendDataSms(byte[], int, java.lang.String, int, int, android.service.carrier.CarrierMessagingService.ResultCallback<android.service.carrier.CarrierMessagingService.SendSmsResult>);
     method public void onSendMms(android.net.Uri, int, android.net.Uri, android.service.carrier.CarrierMessagingService.ResultCallback<android.service.carrier.CarrierMessagingService.SendMmsResult>);
@@ -34265,6 +34266,9 @@
     field public static final int DOWNLOAD_STATUS_ERROR = 2; // 0x2
     field public static final int DOWNLOAD_STATUS_OK = 0; // 0x0
     field public static final int DOWNLOAD_STATUS_RETRY_ON_CARRIER_NETWORK = 1; // 0x1
+    field public static final int RECEIVE_OPTIONS_DEFAULT = 0; // 0x0
+    field public static final int RECEIVE_OPTIONS_DROP = 1; // 0x1
+    field public static final int RECEIVE_OPTIONS_SKIP_NOTIFY_WHEN_CREDENTIAL_ENCRYPTED_STORAGE_UNAVAILABLE = 2; // 0x2
     field public static final int SEND_FLAG_REQUEST_DELIVERY_STATUS = 1; // 0x1
     field public static final int SEND_STATUS_ERROR = 2; // 0x2
     field public static final int SEND_STATUS_OK = 0; // 0x0
diff --git a/core/java/android/service/carrier/CarrierMessagingService.java b/core/java/android/service/carrier/CarrierMessagingService.java
index f5396a3..140341c 100644
--- a/core/java/android/service/carrier/CarrierMessagingService.java
+++ b/core/java/android/service/carrier/CarrierMessagingService.java
@@ -51,6 +51,30 @@
             = "android.service.carrier.CarrierMessagingService";
 
     /**
+     * The default bitmask value passed to the callback of {@link #onReceiveTextSms} with all
+     * {@code RECEIVE_OPTIONS_x} flags cleared to indicate that the message should be kept and a
+     * new message notification should be shown.
+     *
+     * @see #RECEIVE_OPTIONS_DROP
+     * @see #RECEIVE_OPTIONS_SKIP_NOTIFY_WHEN_CREDENTIAL_ENCRYPTED_STORAGE_UNAVAILABLE
+     */
+    public static final int RECEIVE_OPTIONS_DEFAULT = 0;
+
+    /**
+     * Used to set the flag in the bitmask passed to the callback of {@link #onReceiveTextSms} to
+     * indicate that the inbound SMS should be dropped.
+     */
+    public static final int RECEIVE_OPTIONS_DROP = 0x1;
+
+    /**
+     * Used to set the flag in the bitmask passed to the callback of {@link #onReceiveTextSms} to
+     * indicate that a new message notification should not be shown to the user when the
+     * credential-encrypted storage of the device is not available before the user unlocks the
+     * phone. It is only applicable to devices that support file-based encryption.
+     */
+    public static final int RECEIVE_OPTIONS_SKIP_NOTIFY_WHEN_CREDENTIAL_ENCRYPTED_STORAGE_UNAVAILABLE = 0x2;
+
+    /**
      * Indicates that an SMS or MMS message was successfully sent.
      */
     public static final int SEND_STATUS_OK = 0;
@@ -96,7 +120,9 @@
      * @param subId SMS subscription ID of the SIM
      * @param callback result callback. Call with {@code true} to keep an inbound SMS message and
      *        deliver to SMS apps, and {@code false} to drop the message.
+     * @deprecated Use {@link #onReceiveTextSms} instead.
      */
+    @Deprecated
     public void onFilterSms(@NonNull MessagePdu pdu, @NonNull String format, int destPort,
             int subId, @NonNull ResultCallback<Boolean> callback) {
         // optional
@@ -107,6 +133,36 @@
     }
 
     /**
+     * Override this method to filter inbound SMS messages.
+     *
+     * <p>This method will be called once for every incoming text SMS. You can invoke the callback
+     * with a bitmask to tell the platform how to handle the SMS. For a SMS received on a
+     * file-based encryption capable device while the credential-encrypted storage is not available,
+     * this method will be called for the second time when the credential-encrypted storage becomes
+     * available after the user unlocks the phone, if the bit {@link #RECEIVE_OPTIONS_DROP} is not
+     * set when invoking the callback.
+     *
+     * @param pdu the PDUs of the message
+     * @param format the format of the PDUs, typically "3gpp" or "3gpp2"
+     * @param destPort the destination port of a binary SMS, this will be -1 for text SMS
+     * @param subId SMS subscription ID of the SIM
+     * @param callback result callback. Call with a bitmask integer to indicate how the incoming
+     *        text SMS should be handled by the platform. Use {@link #RECEIVE_OPTIONS_DROP} and
+     *        {@link #RECEIVE_OPTIONS_SKIP_NOTIFY_WHEN_CREDENTIAL_ENCRYPTED_STORAGE_UNAVAILABLE}
+     *        to set the flags in the bitmask.
+     */
+    public void onReceiveTextSms(@NonNull MessagePdu pdu, @NonNull String format,
+            int destPort, int subId, @NonNull final ResultCallback<Integer> callback) {
+        onFilterSms(pdu, format, destPort, subId, new ResultCallback<Boolean>() {
+            @Override
+            public void onReceiveResult(Boolean result) throws RemoteException {
+                callback.onReceiveResult(result ? RECEIVE_OPTIONS_DEFAULT : RECEIVE_OPTIONS_DROP
+                    | RECEIVE_OPTIONS_SKIP_NOTIFY_WHEN_CREDENTIAL_ENCRYPTED_STORAGE_UNAVAILABLE);
+            }
+        });
+    }
+
+    /**
      * Override this method to intercept text SMSs sent from the device.
      * @deprecated Override {@link #onSendTextSms} below instead.
      *
@@ -408,10 +464,11 @@
         @Override
         public void filterSms(MessagePdu pdu, String format, int destPort,
                               int subId, final ICarrierMessagingCallback callback) {
-            onFilterSms(pdu, format, destPort, subId, new ResultCallback<Boolean>() {
+            onReceiveTextSms(pdu, format, destPort, subId,
+                new ResultCallback<Integer>() {
                     @Override
-                    public void onReceiveResult(final Boolean result) throws RemoteException {
-                        callback.onFilterComplete(result);
+                    public void onReceiveResult(Integer options) throws RemoteException {
+                        callback.onFilterComplete(options);
                     }
                 });
         }
diff --git a/core/java/android/service/carrier/ICarrierMessagingCallback.aidl b/core/java/android/service/carrier/ICarrierMessagingCallback.aidl
index 6118a20..2753669 100644
--- a/core/java/android/service/carrier/ICarrierMessagingCallback.aidl
+++ b/core/java/android/service/carrier/ICarrierMessagingCallback.aidl
@@ -22,7 +22,7 @@
  * @hide
  */
 oneway interface ICarrierMessagingCallback {
-    void onFilterComplete(boolean keepMessage);
+    void onFilterComplete(int result);
     void onSendSmsComplete(int result, int messageRef);
     void onSendMultipartSmsComplete(int result, in int[] messageRefs);
     void onSendMmsComplete(int result, in byte[] sendConfPdu);