Fix a bug that prevented notification reinflate on user switch.

ViewConfigCoordinator now relies on a consistent 'isSwitchingUser' signal to guarantee that change events that are coalesced are always triggered, because the state is all tracked within this class.

Bug: 227880269
Test: atest ViewConfigCoordinatorTest
Change-Id: I36f9723e3673aa9079c1f467cc812b076a3271d1