Fix: video conference sfu client implementation.
- re-assign the RtpProfile for auxilliary rtp sessions, otherwise it is pointing to nowhere causing various RTP processing failures when receiving video RTP packets
- reset the video decoder when the aggregator decides to switch, in order to avoid raising unpacking errors due to RTP sequence number gaps. This unpackaing errors causes a PLI to be requested and the frame is dropped, which causes additional delay to show the new video stream.