Merge "[Output Switcher] Add switch confirm dialog" into udc-dev am: b8757952 am: ff430539 am: e26ada17 am: 82861642

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



Change-Id: I6f55adb6442e5bed4d991a74f88b0c75714ff9a1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>