Use hardware layers in more situations

* Turn on while dragging
* Fix bug: don't disable when swiping pages during drag
* Fix bug: disable hardware layers on startup
* Removing old state code in Workspace

Change-Id: I5633dc98f2679784aea5551564dfa19504a074a6

src/com/android/launcher2/BubbleTextView.java

@@ -56,7 +56,6 @@ public class BubbleTextView extends TextView implements VisibilityChangedBroadca
     private final HolographicOutlineHelper mOutlineHelper = new HolographicOutlineHelper();
     private final Canvas mTempCanvas = new Canvas();
     private final Rect mTempRect = new Rect();
-    private final Paint mTempPaint = new Paint();
     private boolean mDidInvalidateForPressedState;
     private Bitmap mPressedOrFocusedBackground;
     private int mFocusedOutlineColor;