Revert "Improve AOSP Download/Upload animation"

This reverts commit 24e8161da33dfc45d42084c9d49c979558d08b4c.

This patch causes weird download animation and disallow themes to theme this animation.
So I think we can revert it.

Change-Id: I9c2a634afc3d2e35bff5f3d5d56f3056fff51938