Merge "[BluetoothMetrics] Adding a mutex for LE Connection Metrics Remote Device."

system/gd/metrics/metrics_state.cc

@@ -204,6 +204,7 @@ void LEConnectionMetricsRemoteDevice::AddStateChangedEvent(
     return;
   }
 
+  std::unique_lock<std::mutex> lock(le_connection_metrics_remote_device_guard);
   auto it = opened_devices.find(address);
   if (it == opened_devices.end()) {
     device_metrics.push_back(std::make_unique<LEConnectionMetricState>(address));

system/gd/metrics/metrics_state.h

@@ -104,6 +104,7 @@ class LEConnectionMetricsRemoteDevice {
   void UploadLEConnectionSession(const hci::Address& address);
 
  private:
+  mutable std::mutex le_connection_metrics_remote_device_guard;
   std::vector<std::unique_ptr<LEConnectionMetricState>> device_metrics;
   std::unordered_map<hci::Address, LEConnectionMetricState*> opened_devices;
   BaseMetricsLoggerModule* metrics_logger_module;