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

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

Change-Id: I08f148210ade5545c070a88656909d4acb7becb7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>