Merge "Abort tf transition if window transaction is no-op" into udc-dev am:...

Merge "Abort tf transition if window transaction is no-op" into udc-dev am: 1f22f537 am: e104f7b8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22163126



Change-Id: I653ab4c42c06dd5b1b5ada77b79cad9cbe00d55a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>