Reset keyguard translation when transition is cancelled

When transitioning to/from the glanceable hub, we translate the keyguard
elements offscreen to the left. If the transition gets cancelled, we
should move the elements back to their original places.

This is reproducible with the following steps:
1) Swipe open the hub from the lockscreen
2) Swipe back slowly and pause halfway through the transition
3) Run "adb shell cmd dreams start-dreaming" to start dreams, while
   paused halfway through the transition.
4) The HUB->LOCKSCREEN transition is cancelled in favor of the HUB->DREAM transition
5) Notifications and clock are stuck with a weird x-translation

Fixes: 329096635
Test: atest SystemUiRoboTest:GlanceableHubToLockscreenTransitionViewModelTest
Test: atest KeyguardTransitionRepositoryTest
Flag: ACONFIG com.android.systemui.communal_hub TEAMFOOD
Change-Id: I09f50bd36c3191d9cb84a61fbb178e570bddcfe3