Fixed an issue where the Device output chip lost its alpha

Since the alpha is determined by the view state, the alpha
we set on the view was dropped. We now set it on the
constraintSet instead and ensure that the state is properly
loaded from the layout when measuring.

Fixes: 156875717
Test: Cast a player, observe device chip being faded
Change-Id: If3f856390542113aaac668799d9b019e064ec909