Fix 3385675: Uninstall option available for system app

- when a system app is selected in all apps, don't show uninstall button
- if it's an updated system app, show "Uninstall update"
- Also, remove unused code for non-existent flag for games

Change-Id: I46753ee8d213b2ba1613b71ac1fe73d79786129c

src/com/android/launcher2/BubbleTextView.java

@@ -171,9 +171,8 @@ public class BubbleTextView extends TextView implements VisibilityChangedBroadca
     }
 
     /**
-     * Draw the View v into the given Canvas.
+     * Draw this BubbleTextView into the given Canvas.
      *
-     * @param v the view to draw
      * @param destCanvas the canvas to draw on
      * @param padding the horizontal and vertical padding to use when drawing
      */