Add FLAG_IMMUTABLE in DevTools app

Happened IllegalArgumentException on DevTools app.
  package : com.android.development
Because PendingIntent requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE.

Test : DevTools - Connectivity - press START SCREEN TOGGLE button

Change-Id: I998c74f974d8f555e8016b2a319e1a9a4a4f2669
Signed-off-by: Sekyeong <sekyeong.heo@samsung.com>
diff --git a/apps/Development/src/com/android/development/Connectivity.java b/apps/Development/src/com/android/development/Connectivity.java
index 1d8a98b..e548fbf 100644
--- a/apps/Development/src/com/android/development/Connectivity.java
+++ b/apps/Development/src/com/android/development/Connectivity.java
@@ -631,7 +631,8 @@
         i.putExtra(TEST_ALARM_OFF_EXTRA, Long.toString(mSCOffDuration));
         i.putExtra(TEST_ALARM_CYCLE_EXTRA, Integer.toString(mSCCycleCount));
 
-        PendingIntent p = PendingIntent.getBroadcast(this, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);
+        PendingIntent p = PendingIntent.getBroadcast(this, 0, i,
+                PendingIntent.FLAG_UPDATE_CURRENT|PendingIntent.FLAG_IMMUTABLE);
 
         am.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() + delayMs, p);
     }