Create UnderlayRepository and UnderlayInteractor to trigger UnderlayView creation/destruction

logic. The broadcast should be a temporary solution and may be
migrated to Binder very soon.

Bug: 403422950
Flag: com.android.systemui.enable_underlay
Test: local build and unit test
Change-Id: Ia349994d82e2f0f82f584dfd8c97df7c7002582e