Merge "Revert "Send update config change when letterbox is moved"" into udc-qpr-dev am: f44c4ffb4a am: 88c269c2e2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24379249

Change-Id: Ic14dca5587fc7dbdf75e4884bd12ae9ecec8d5a5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>