Winson Chung d42a6cfe2b Exploring transitions to/from Recents.
- refactored hwlayers and change view property animations to use a reference counted trigger
- cleaned up RecentsConfiguration, and move it into classes using it
- moved task bar animations back into TaskBarView
- refactoring enter/exit animations to use an animation context

Change-Id: Ia66b622b094f22145c2fab07c2a9bdfd62344be2
2014-06-12 12:57:56 -07:00
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