Class android.media.MediaRouter2

Added Methods
void cancelScanRequest(ScanToken)  
MediaRouter2 getInstance(Context, String, Executor, Runnable)  
RouteListingPreference getRouteListingPreference()  
void registerRouteListingPreferenceUpdatedCallback(Executor, Consumer<RouteListingPreference>)  
ScanToken requestScan(ScanRequest)  
void setRouteVolume(MediaRoute2Info, int)  
void unregisterRouteListingPreferenceUpdatedCallback(Consumer<RouteListingPreference>)