[automerger skipped] Merge "Move call to MediaRouter2Manager to worker thread"...

[automerger skipped] Merge "Move call to MediaRouter2Manager to worker thread" into rvc-qpr-dev am: 5d87980a am: db494c36 -s ours

am skip reason: Change-Id Icf3945a971be84397a335672134b1067decfe6da with SHA-1 290a6244 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12599838

Change-Id: I92796e8918b016fd3446c8ea6c9bbd1642e0c2b3