Merge "Revert "Revert "Fix notification group dismissal fade animation""" into...

Merge "Revert "Revert "Fix notification group dismissal fade animation""" into tm-qpr-dev am: 46fa95fc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20370586



Change-Id: Iddd7b2a860978e7b8190df6ba143b8d9a97a2919
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>