[Mojo Video Capture] Adapt video_capture service to refactored video capture stack

services/video_capture/public/interfaces/device.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module video_capture.mojom;
 
 import "media/capture/mojo/video_capture_types.mojom";
 import "services/video_capture/public/interfaces/receiver.mojom";
 
 // Represents access to a video capture device available on the machine.
 // Note: Instead of offering an explicit Stop() method, the device
 // is stopped automatically when the message pipe corresponding to either the
 // Device or the given |receiver| is closed.
 interface Device {
   Start(media.mojom.VideoCaptureParams requested_settings, Receiver receiver);
+  OnReceiverReportingUtilization(int32 frame_feedback_id,
+                                 double utilization);
 };