Merge "MediaRouter: Route setBluetoothA2dpOn() via MediaRouterService" into sc-qpr1-dev am: 2c7ec2cbf5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16044773

Change-Id: I017be1b10677f78ee7f5b290a13eab376c4e0615