Change the intent flag to immutable

Bug: 256590210
Test: make RunSettingsRoboTests ROBOTEST_FILTER=MediaVolumePreferenceControllerTest
Change-Id: I68132f863027fab19351b4fdbc363e5c274e3327

src/com/android/settings/notification/MediaVolumePreferenceController.java

diff --git a/src/com/android/settings/notification/MediaVolumePreferenceController.java b/src/com/android/settings/notification/MediaVolumePreferenceController.java
index 0ddba08..443f748 100644
--- a/src/com/android/settings/notification/MediaVolumePreferenceController.java
+++ b/src/com/android/settings/notification/MediaVolumePreferenceController.java
@@ -124,7 +124,7 @@
                     getWorker().getActiveLocalMediaController().getPackageName());
 
             pi = PendingIntent.getBroadcast(context, 0 /* requestCode */, intent,
-                    PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_MUTABLE);
+                    PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
         } else {
             final CachedBluetoothDevice bluetoothDevice =
                     ((BluetoothMediaDevice) mMediaDevice).getCachedDevice();
@@ -141,7 +141,7 @@
                     && getWorker().getActiveLocalMediaController() != null);
 
             pi = PendingIntent.getActivity(context, 0 /* requestCode */, intent,
-                    PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_MUTABLE);
+                    PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
         }
 
         final IconCompat icon = getBroadcastIcon(context);