Merge "Remove notification permission feature flag" into tm-dev am: 23a85a1f96 am: c80fc1ba4d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/18164272

Change-Id: Id34ab31feb04fb25e7103623387b873906a94838
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>