/System/Library/PrivateFrameworks/AVKitMacHelper.framework/Versions/A/XPCServices/RoutePickerViewService.xpc/Contents/MacOS/RoutePickerViewService
The binary is a part of AVKitMacHelper private framework.
/System/Library/Frameworks/AVKit.framework/Versions/A/XPCServices/RoutePickerViewService.xpc/Contents/MacOS/RoutePickerViewService
The binary is a part of AVKit public framework.