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: 7c89f7ed

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



Change-Id: I361807a633e2517d4b410319a1f8bd701729f1b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>