Fix jumps in the beginning of animations

If the first draw frame of an animation is
expensive, which it often is, it causes a big
jump. Added a helper class which automatically
adjusts the animation start time if the first
frame is more than 16ms.

Change-Id: I100edbc41c2abe930a32d6bcf0a782ea9735f7f9

src/com/android/launcher2/SearchDropTargetBar.java

@@ -77,7 +77,6 @@ public class SearchDropTargetBar extends FrameLayout implements DragController.D
         // Enable the hw layers before the animation starts (will be disabled in the onAnimationEnd
         // callback below)
         v.setLayerType(View.LAYER_TYPE_HARDWARE, null);
-        v.buildLayer();
     }
 
     private void setupAnimation(ObjectAnimator anim, final View v) {