Merge "[Output Switcher] Add preference route listing check" into tm-qpr-dev am: dc590194

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20729998



Change-Id: I05e337cb995aed39c806b9bd03f9a2980e675aa1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>