Fix clip reveal animation in docked window case

- Move ClipRectTB/LRAnimation to wm package, because that's the only
place we use it.
- Extend ClipRectTBAnimation to combine it with translation animation
so the clipping gets applied after the translation.
- Fix clip reveal transitions when a window is docked.
- Make the docked divider minimizing animations synchronized with clip
reveal animation.

Bug: 27154882
Bug: 22174716

Change-Id: If5c94c777f3b51c6f53f6f34cc261bf3439cfc88