Add transitions between glanceable hub and dozing

No animations needed at the moment, this just ensures KeyguardState
remains accurate.

Bug: 319721010
Flag: ACONFIG com.android.systemui.communal_hub DEVELOPMENT
Test: atest KeyguardTransitionScenariosTest
Change-Id: I33b84f05297540660652ab74a89d59c11889fb7a
3 files changed