Merge "[flexiglass] Scalable scene transition definitions in Flexiglass." into udc-qpr-dev am: c1adfb3028 am: 59bb882277

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24405059

Change-Id: I1a8203d896d7a3e0912a18d7319741f7321a09ba
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>