Merge "Remove notification permission feature flag" into tm-dev am: 23a85a1f96 am: 8e41734caf

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

Change-Id: I7d6153f6f46a116a3a25872dc422a59b02ffd1fa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>