Bug 1774565 - Pass FLAG_IMMUTABLE in pendingIntents. r=calu

This is a requirement when targeting Android 31 and above:
https://developer.android.com/about/versions/12/behavior-changes-12.

Differential Revision: https://phabricator.services.mozilla.com/D149541

mobile/android/geckoview_example/src/main/java/org/mozilla/geckoview_example/ExampleCrashHandler.java

@@ -52,13 +52,24 @@ public class ExampleCrashHandler extends Service {
 
       String id = createNotificationChannel();
 
+      int intentFlag = 0;
+      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+        intentFlag = PendingIntent.FLAG_IMMUTABLE;
+      }
+
       PendingIntent reportIntent =
           PendingIntent.getService(
-              this, 0, new Intent(ACTION_REPORT_CRASH, null, this, ExampleCrashHandler.class), 0);
+              this,
+              0,
+              new Intent(ACTION_REPORT_CRASH, null, this, ExampleCrashHandler.class),
+              intentFlag);
 
       PendingIntent dismissIntent =
           PendingIntent.getService(
-              this, 0, new Intent(ACTION_DISMISS, null, this, ExampleCrashHandler.class), 0);
+              this,
+              0,
+              new Intent(ACTION_DISMISS, null, this, ExampleCrashHandler.class),
+              intentFlag);
 
       Notification notification =
           new NotificationCompat.Builder(this, id)
@@ -66,8 +77,8 @@ public class ExampleCrashHandler extends Service {
               .setContentTitle(getResources().getString(R.string.crashed_title))
               .setContentText(getResources().getString(R.string.crashed_text))
               .setDefaults(Notification.DEFAULT_ALL)
-              .setContentIntent(reportIntent)
               .addAction(0, getResources().getString(R.string.crashed_ignore), dismissIntent)
+              .addAction(0, getResources().getString(R.string.crashed_report), reportIntent)
               .setAutoCancel(true)
               .setOngoing(false)
               .build();

mobile/android/geckoview_example/src/main/java/org/mozilla/geckoview_example/GeckoViewActivity.java

@@ -812,7 +812,8 @@ public class GeckoViewActivity extends AppCompatActivity
                 Intent clickIntent = new Intent(GeckoViewActivity.this, GeckoViewActivity.class);
                 clickIntent.putExtra("onClick", notification);
                 PendingIntent dismissIntent =
-                    PendingIntent.getActivity(GeckoViewActivity.this, mLastID, clickIntent, 0);
+                    PendingIntent.getActivity(
+                        GeckoViewActivity.this, mLastID, clickIntent, PendingIntent.FLAG_IMMUTABLE);
 
                 NotificationCompat.Builder builder =
                     new NotificationCompat.Builder(GeckoViewActivity.this, CHANNEL_ID)

mobile/android/geckoview_example/src/main/res/values/strings.xml

@@ -33,6 +33,7 @@
     <string name="crashed_title">GeckoView Example Crashed</string>
     <string name="crashed_text">Tap to report to Mozilla.</string>
     <string name="crashed_ignore">Ignore</string>
+    <string name="crashed_report">Report</string>
     <string name="device_sharing_microphone">Microphone is on</string>
     <string name="device_sharing_camera">Camera is on</string>
     <string name="device_sharing_camera_and_mic">Camera and microphone are on</string>