Fixing tint not getting applied when an item is dragged over a drop target

> Changing spring animation to use drawable instead of views. This
  allows us to reuse the size calculations from AdaptiveIconDrawable,
  instead of reimplementing the logic.
> Updating tint logic to concat any existing filter and reapply it to
  the drawable

Bug: 63873434
Change-Id: I30e97d181bd3439e5b10272d4964bad1c70ceb3c