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 am: 1a225043

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



Change-Id: I0c3b4e543503bde642f6d5c1c5ef8ddea0a3735d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>