Data connection for carrier specific APN

Implement the following features to support carrier network connection.
This commit is to define the carrier config for each features.

1. Sets default preferred APN
2. Uses dun APN when using Preset APN in roaming network

Also, fixed that to use only APNs with the same set id as preferred
APN.

Test: Manual
Bug: 147969062
Merged-in: If1e6d2bf58de39c22caa901fcd90fb11f104d900
Change-Id: If1e6d2bf58de39c22caa901fcd90fb11f104d900

4 files changed, 31 insertions, 8 deletions

diff --git a/api/system-current.txt b/api/system-current.txt
index 9dde046ec313..7094595c5fb3 100755
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -9239,6 +9239,7 @@ package android.provider {
     field public static final String APN_SET_ID = "apn_set_id";
     field public static final int CARRIER_EDITED = 4; // 0x4
     field public static final String EDITED_STATUS = "edited";
+    field public static final int MATCH_ALL_APN_SET_ID = -1; // 0xffffffff
     field public static final String MAX_CONNECTIONS = "max_conns";
     field public static final String MODEM_PERSIST = "modem_cognitive";
     field public static final String MTU = "mtu";
diff --git a/core/java/android/provider/Telephony.java b/core/java/android/provider/Telephony.java
index 784119f94679..2c2d127b0414 100644
--- a/core/java/android/provider/Telephony.java
+++ b/core/java/android/provider/Telephony.java
@@ -3948,8 +3948,7 @@ public final class Telephony {
 
         /**
          * The APN set id. When the user manually selects an APN or the framework sets an APN as
-         * preferred, all APNs with the same set id as the selected APN should be prioritized over
-         * APNs in other sets.
+         * preferred, the device can only use APNs with the same set id as the selected APN.
          * <p>Type: INTEGER</p>
          * @hide
          */
@@ -3957,9 +3956,7 @@ public final class Telephony {
         public static final String APN_SET_ID = "apn_set_id";
 
         /**
-         * Possible value for the {@link #APN_SET_ID} field. By default APNs will not belong to a
-         * set. If the user manually selects an APN without apn set id, there is no need to
-         * prioritize any specific APN set ids.
+         * Possible value for the {@link #APN_SET_ID} field. By default APNs are added to set 0.
          * <p>Type: INTEGER</p>
          * @hide
          */
@@ -3967,6 +3964,16 @@ public final class Telephony {
         public static final int NO_APN_SET_ID = 0;
 
         /**
+         * Possible value for the {@link #APN_SET_ID} field.
+         * APNs with MATCH_ALL_APN_SET_ID will be used regardless of any set ids of
+         * the selected APN.
+         * <p>Type: INTEGER</p>
+         * @hide
+         */
+        @SystemApi
+        public static final int MATCH_ALL_APN_SET_ID = -1;
+
+        /**
          * A unique carrier id associated with this APN
          * {@see TelephonyManager#getSimCarrierId()}
          * <p>Type: STRING</p>
diff --git a/non-updatable-api/system-current.txt b/non-updatable-api/system-current.txt
index 22d9ec2a1574..d788dadd64a4 100644
--- a/non-updatable-api/system-current.txt
+++ b/non-updatable-api/system-current.txt
@@ -8121,6 +8121,7 @@ package android.provider {
     field public static final String APN_SET_ID = "apn_set_id";
     field public static final int CARRIER_EDITED = 4; // 0x4
     field public static final String EDITED_STATUS = "edited";
+    field public static final int MATCH_ALL_APN_SET_ID = -1; // 0xffffffff
     field public static final String MAX_CONNECTIONS = "max_conns";
     field public static final String MODEM_PERSIST = "modem_cognitive";
     field public static final String MTU = "mtu";
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index c9781545a9eb..97b97488e6c6 100755
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -3880,10 +3880,23 @@ public class CarrierConfigManager {
      * Indicating whether DUN APN should be disabled when the device is roaming. In that case,
      * the default APN (i.e. internet) will be used for tethering.
      *
+     * This config is only available when using Preset APN(not user edited) as Preferred APN.
+     *
+     * @hide
+     */
+    public static final String KEY_DISABLE_DUN_APN_WHILE_ROAMING_WITH_PRESET_APN_BOOL =
+            "disable_dun_apn_while_roaming_with_preset_apn_bool";
+
+    /**
+     * Where there is no preferred APN, specifies the carrier's default preferred APN.
+     * Specifies the {@link android.provider.Telephony.Carriers.APN} of the default preferred apn.
+     *
+     * This config is only available with Preset APN(not user edited).
+     *
      * @hide
      */
-    public static final String KEY_DISABLE_DUN_APN_WHILE_ROAMING =
-            "disable_dun_apn_while_roaming";
+    public static final String KEY_DEFAULT_PREFERRED_APN_NAME_STRING =
+            "default_preferred_apn_name_string";
 
     /** The default value for every variable. */
     private final static PersistableBundle sDefaults;
@@ -4422,7 +4435,8 @@ public class CarrierConfigManager {
                 "ims:2", "cbs:2", "ia:2", "emergency:2", "mcx:3", "xcap:3"
         });
         sDefaults.putStringArray(KEY_MISSED_INCOMING_CALL_SMS_PATTERN_STRING_ARRAY, new String[0]);
-        sDefaults.putBoolean(KEY_DISABLE_DUN_APN_WHILE_ROAMING, false);
+        sDefaults.putBoolean(KEY_DISABLE_DUN_APN_WHILE_ROAMING_WITH_PRESET_APN_BOOL, false);
+        sDefaults.putString(KEY_DEFAULT_PREFERRED_APN_NAME_STRING, "");
     }
 
     /**