Fix LsSceneTransitionInteractor's handling of canceled overlay transitions.

LsSceneTransitionInteractor was sending us to LOCKSCREEN if we canceled a Bouncer -> Lockscreen transition and returned to Bouncer, since it was only looking at our FINISHED transition to Scenes.Lockscreen.

This fixes the issue where UDFPS is touchable over Bouncer, but probably fixes some other things as well. I'm actually very surprised that KTF being in LOCKSCREEN while Bouncer is showing works as well as it does.

Bug: 444041956
Test: atest LockscreenSceneTransitionInteractorTest
Flag: com.android.systemui.scene_container
Change-Id: I8b303bc32b20d5d08b0582d35dd32454bd3dbd39