Do not dismiss the activity if it is being stopped.

This allows the activity to stick around if another activity
(like calendar alerts) pops up on top.

Bug: 2577091
Change-Id: I46ca5596f96e05184b64cc9a73b4e1e9a33f1561

src/com/android/deskclock/AlarmAlertFullScreen.java

@@ -238,15 +238,6 @@ public class AlarmAlertFullScreen extends Activity {
         }
     }
 
-    @Override
-    protected void onStop() {
-        super.onStop();
-        if (!isFinishing()) {
-            // Don't hang around.
-            finish();
-        }
-    }
-    
     @Override
     public void onDestroy() {
         super.onDestroy();