message: Fix unitialized connection key
diff: @@ -211,7 +211,8 @@ TransportAdapter::Error TransportAdapterImpl::Connect(
  connections_lock_.AcquireForWriting();
  - std::pair<DeviceUID, ApplicationHandle> connection_key;
  + std::pair<DeviceUID, ApplicationHandle> connection_key =
  + std::make_pair(device_id, app_handle);
  const bool already_exists =
  connections_.end() != connections_.find(connection_key);
  ConnectionInfo& info = connections_[connection_key];
  