Revert "Specify explicitly FLAG_IMMUTABLE for PendingIntent"

This reverts commit 9cbb4fa4e7.

Reason for revert: this change might cause NPE on Settings app.

Change-Id: I4fd5ec36941c7516a25eaff6d64bcf62e0de7b39

src/com/android/settings/fuelgauge/batterytip/BatteryTipUtils.java

@@ -124,7 +124,7 @@ public class BatteryTipUtils {
             throws StatsManager.StatsUnavailableException {
         final Intent extraIntent = new Intent(context, AnomalyDetectionReceiver.class);
         final PendingIntent pendingIntent = PendingIntent.getBroadcast(context, REQUEST_CODE,
-                extraIntent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
+                extraIntent, PendingIntent.FLAG_UPDATE_CURRENT);
         statsManager.setBroadcastSubscriber(pendingIntent,
                 StatsManagerConfig.ANOMALY_CONFIG_KEY, StatsManagerConfig.SUBSCRIBER_ID);
     }