Merge "Plumb Scene-transition tag through shell transitions" into udc-dev am:...

Merge "Plumb Scene-transition tag through shell transitions" into udc-dev am: de91c389 am: 93478e5c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22934736



Change-Id: I9f772fd5b7d03ea31137e654a77a180001673888
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>