Add initial split from GroupedTaskView animation

* Created SplitAnimationController to prevent more
RecentsView bloat
* Extract SplitSelectSource attributes into separate class
* http://recall/-/cMb5xTTxhmZtFt04eYnmQj/eACJq1un8Ef91LgmQblpAw

Bug: 267370106
Change-Id: I5d430c091ac84bbbc30319e7b78711b610a21252
8 files changed