Merge "Remove NotifGroupManagerLegacy usage from Bubbles" into tm-qpr-dev am: d215285a64

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19735656

Change-Id: I12d8cf2861db18da1ea379a2b53a64bbb92103b2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>