Merge "Update Window Extensions library APIs" into tm-qpr-dev am: 0cb6a60e59 am: ed16314594

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20478645

Change-Id: I7b59a06b0fc06fbecaa097196e8cac555bcd454c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>