Merge "Fix notification group dismissal fade animation" into tm-qpr-dev am: 0bad9c5a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20150884



Change-Id: I3e52612593904ce861b96cc3a117640645d35645
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>