Modernize LightsOutNotifController

- Refactor LightsOutNotifController to stop using NotifLiveData.
- Change the API of StatusBarModeRepository, to make it explicit which display is used when subscribing for StatusBarMode updates.

Bug: 308623704
Test: atest SystemUITests:CollapsedStatusBarViewModelImplTest SystemUITests:LightsOutInteractorTest SystemUITests:CollapsedStatusBarFragmentTest
Flag: ACONFIG com.android.systemui.notifications_live_data_store_refactor DEVELOPMENT

Change-Id: I908aedf856657cbbdb5f330a70e1100fea6337c1