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 am: a3cfe223 am: 9accb19f

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



Change-Id: I7b523e99d41222939e98ee01c4bb4f392031e35c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>