Merge "[Output Switcher] Add switch confirm dialog" into udc-dev am:...

Merge "[Output Switcher] Add switch confirm dialog" into udc-dev am: b8757952 am: a937b49d am: 68860511 am: b7b33239

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22952407



Change-Id: I06b9e758200557f4d02d5bafce7890902bd082c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>