[sb] use HeadsUpNotificationInteractor to control clock visibility

This brings the StatusBarRootModernization flag up-to-par with HUNs.

- Use INVISIBLE for the clock instead of GONE. This ensures that the
  aniamtions work correctly
- During HUNs, we set the clock visibilty to INVISIBLE for the view
  model
- Move 2 flows in HeadsUpNotificationInteractor from out of behind the
  SceneContainer flag, so that we can use them instead of the
  HeadsUpAppearanceController callbacks

Test: HeadsUpNotificationInteractorTest
Test: HomeStatusBarViewModelImplTest
Test: manual using Notify.apk
Bug: 364360986
Flag: com.android.systemui.status_bar_notification_chips
Change-Id: I2539124be859ee0fd50d93bc121e6670cd9828e9