Controls UI - Motion for activities

Transition back to global actions with animations. Delay
pager/recyclerview loading until later in the activity cycle for
smoother animations. Fix race conditions discovered while testing,
around canceling load subscriptions too early.

Bug: 154158092
Bug: 154509798
Test: atest ControlsControllerImplTest
Change-Id: I019c269fc6a54dce6e762cb710b0a254a58d9a2d