Merge "Remove "System UI" talkback announcement" into udc-dev am: 818f3183

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22989401



Change-Id: Ifa95213f4be84f6ff9d52853e7fd3ebb7b8a9c2e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>