Add API for immutable PendingIntents

So PendingIntent users can determine if a PI is immutable or not.

Bug: 171803518
Test: atest PendingIntentTest
Change-Id: Ie45ef8b327c0bdf1232ca3ae28c7744cb6d3e83f

5 files changed, 24 insertions, 0 deletions

diff --git a/api/current.txt b/api/current.txt
index 9ff7cc255bf4..65f3370c0399 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -6138,6 +6138,7 @@ package android.app {
     method public android.content.IntentSender getIntentSender();
     method public static android.app.PendingIntent getService(android.content.Context, int, @NonNull android.content.Intent, int);
     method @Deprecated public String getTargetPackage();
+    method public boolean isImmutable();
     method @Nullable public static android.app.PendingIntent readPendingIntentOrNullFromParcel(@NonNull android.os.Parcel);
     method public void send() throws android.app.PendingIntent.CanceledException;
     method public void send(int) throws android.app.PendingIntent.CanceledException;
diff --git a/core/api/current.txt b/core/api/current.txt
index 16a5f5e82f21..083dd038e462 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -6138,6 +6138,7 @@ package android.app {
     method public android.content.IntentSender getIntentSender();
     method public static android.app.PendingIntent getService(android.content.Context, int, @NonNull android.content.Intent, int);
     method @Deprecated public String getTargetPackage();
+    method public boolean isImmutable();
     method @Nullable public static android.app.PendingIntent readPendingIntentOrNullFromParcel(@NonNull android.os.Parcel);
     method public void send() throws android.app.PendingIntent.CanceledException;
     method public void send(int) throws android.app.PendingIntent.CanceledException;
diff --git a/core/java/android/app/IActivityManager.aidl b/core/java/android/app/IActivityManager.aidl
index 879d4373f964..560b5be264d6 100644
--- a/core/java/android/app/IActivityManager.aidl
+++ b/core/java/android/app/IActivityManager.aidl
@@ -342,6 +342,7 @@ interface IActivityManager {
     @UnsupportedAppUsage
     void unregisterProcessObserver(in IProcessObserver observer);
     boolean isIntentSenderTargetedToPackage(in IIntentSender sender);
+    boolean isIntentSenderImmutable(in IIntentSender sender);
     @UnsupportedAppUsage
     void updatePersistentConfiguration(in Configuration values);
     void updatePersistentConfigurationWithAttribution(in Configuration values,
diff --git a/core/java/android/app/PendingIntent.java b/core/java/android/app/PendingIntent.java
index 21dfbbd6f15d..f76a75749480 100644
--- a/core/java/android/app/PendingIntent.java
+++ b/core/java/android/app/PendingIntent.java
@@ -1145,6 +1145,18 @@ public final class PendingIntent implements Parcelable {
     }
 
     /**
+     * Check if this PendingIntent is marked with {@link #FLAG_IMMUTABLE}.
+     */
+    public boolean isImmutable() {
+        try {
+            return ActivityManager.getService()
+                    .isIntentSenderImmutable(mTarget);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
      * @hide
      * Check whether this PendingIntent will launch an Activity.
      */
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 112814c69d9b..081493752e31 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -4890,6 +4890,15 @@ public class ActivityManagerService extends IActivityManager.Stub
     }
 
     @Override
+    public boolean isIntentSenderImmutable(IIntentSender pendingResult) {
+        if (pendingResult instanceof PendingIntentRecord) {
+            final PendingIntentRecord res = (PendingIntentRecord) pendingResult;
+            return (res.key.flags & PendingIntent.FLAG_IMMUTABLE) != 0;
+        }
+        return false;
+    }
+
+    @Override
     public boolean isIntentSenderAnActivity(IIntentSender pendingResult) {
         if (!(pendingResult instanceof PendingIntentRecord)) {
             return false;