DSDisplayDeviceOutput: implement the output callback of the OutputTDM implements

DSDisplayDeviceOutput: implement the output callback of the OutputTDM implements

There are five callback functions for the DeviceOuput.

IDSDisplayDevice class has OutputAdded and OutputRemoved callbacks.
  virtual void registerCallbackOutputAdded(DSObject *slot, std::function<void(IDSDisplayDeviceOutput *)> func) = 0;
  virtual void registerCallbackOutputRemoved(DSObject *slot, std::function<void(IDSDisplayDeviceOutput *)> func) = 0;

IDSDisplayDeviceOutput class has OutputConnected, OutputDisconnected and OutputResolutionSet callbacks.
  virtual void registerCallbackOutputConnected(DSObject *slot, std::function<void(IDSDisplayDeviceOutput *)> func) = 0;
  virtual void registerCallbackOutputDisconnected(DSObject *slot, std::function<void(IDSDisplayDeviceOutput *)> func) = 0;
  virtual void registerCallbackOutputResolutionSet(DSObject *slot, std::function<void(IDSDisplayDeviceOutput *)> func) = 0;

DSDisplayDeviceTDMImpl and DSDisplayDeviceOutputTDMImpl override these functions and implement them.

Change-Id: If76a02aa5348d5e1b5827960e86c2de55729792f