[DO NOT MERGE] DREAMING->LOCKSCREEN, lockscreen updates

This will address this transition, as well as handle all general
unocclusion, by listening to the KeyguardTransitionRepository for
events rather than attempting to coordinate individual views across
many controllers.

To enable: adb shell cmd statusbar flag 223 true

Test: atest DreamingToLockscreenTransitionViewModelTest
KeyguardStatusViewTest KeyguardStatusViewControllerTest
NotificationPanelViewControllerTest
Bug: 260631205

Change-Id: I70d5b68a8f9c6b2fa738445d46435f3f09d1f68d
16 files changed