Fix a bug with ICE and strictrtp where media could get dropped.

If the end result of the ICE negotiation resulted in the path for media
changing it was possible for the strictrtp code to discard the RTP packets.
This change causes strictrtp to enter learning mode once again when the
ICE negotiation has completed successfully.


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/11@382296 f38db490-d61c-443f-a65b-d21fe96a405b
While the ICE negotiation is occurring leave strictrtp in an open state, media can and will come from different places.


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/11@382298 f38db490-d61c-443f-a65b-d21fe96a405b