Fix multiple issues with DREAM => LOCKSCREEN transition

- The transition is now playing all parts in parallel (previously: serial) and according to spec -> proper curves, proper timings
- All parts of the transition are now based on the transition framework and are guaranteed to be synchronized
- The animations were not playing at all due to a bug in transition framework

Spec: https://direct.googleplex.com/#/spec/277250003

Bug: b/267520000
Test: atest SystemUITests
Test: manually tested and aligned with spec
Change-Id: I0a8e096d9e6c08f0ce2e7736fb5679951602cfe0
Merged-In: I0a8e096d9e6c08f0ce2e7736fb5679951602cfe0