Add transitions between glanceable hub and bouncer

Also updates touch handling so that bottom edge swipes on the hub can
open the bouncer.

The animations between the hub and bouncer(s) already work fine, this
change just adds proper keyguard transitions so that the transition
state is correct.

Bug: 315207481
Bug: 315194778
Test: atest KeyguardTransitionScenariosTest GlanceableHubContainerControllerTest
Test: manually verified through logs that keyguard transition state is
      accurate when going between hub and bouncer
Flag: ACONFIG com.android.systemui.communal_hub DEVELOPMENT
Change-Id: I79a0f01f3379f22032edaa4bcc89d5193c3d2a46