[Mojo Video Capture] Stop service when last client disconnects.

services/video_capture/public/cpp/device_to_feedback_observer_adapter.cc

Index: services/video_capture/public/cpp/device_to_feedback_observer_adapter.cc
diff --git a/services/video_capture/public/cpp/device_to_feedback_observer_adapter.cc b/services/video_capture/public/cpp/device_to_feedback_observer_adapter.cc
index ad842a7b9576e5e814fe9e53772cadad259c216b..3811443c989ef6e1709bec16c3116f1b8bd7e419 100644
--- a/services/video_capture/public/cpp/device_to_feedback_observer_adapter.cc
+++ b/services/video_capture/public/cpp/device_to_feedback_observer_adapter.cc
@@ -7,14 +7,14 @@
 namespace video_capture {
 
 DeviceToFeedbackObserverAdapter::DeviceToFeedbackObserverAdapter(
-    mojom::DevicePtr device)
+    mojom::DevicePtr* device)
     : device_(std::move(device)) {}
 
 DeviceToFeedbackObserverAdapter::~DeviceToFeedbackObserverAdapter() = default;
 
 void DeviceToFeedbackObserverAdapter::OnUtilizationReport(int frame_feedback_id,
                                                           double utilization) {
-  device_->OnReceiverReportingUtilization(frame_feedback_id, utilization);
+  (*device_)->OnReceiverReportingUtilization(frame_feedback_id, utilization);
 }
 
 }  // namespace video_capture