Controls UI - Multi-user switch updates

Do not propogate events on a user switch. Do not clear all
services either, as this can trigger unwanted downstream logic to
believe the components were removed.

Bug: 156758594
Test: atest ControlsListingControllerImplTest ControlsControllerImplTest

Change-Id: Iee38f358dbcbbfc4a25866599fc40076b93ac533