Add the URI to the queue.

        For arguments and return value see `add_to_queue`.

def add_uri_to_queue(self, uri, position=0, as_next=False):
        """Add the URI to the queue.

        For arguments and return value see `add_to_queue`.
        """
        # FIXME: The res.protocol_info should probably represent the mime type
        # etc of the uri. But this seems OK.
        res = [DidlResource(uri=uri, protocol_info="x-rincon-playlist:*:*:*")]
        item = DidlObject(resources=res, title='', parent_id='', item_id='')
        return self.add_to_queue(item, position, as_next)