set 'media-title' property for bluray disc with meta-data

This commit contains next changes:
* Change STREAM_CTRL_GET_DVD_VOLUME_ID to more general name, STREAM_CTRL_GET_DISC_NAME
* Implement STREAM_CTRL_GET_DISC_NAME for bluray stream
* Return the value by STREAM_CTRL_GET_DISC_NAME for optical disc's 'media-title' property.