Instead of printing out one codec in sip show channels print out all of the...

Instead of printing out one codec in sip show channels print out all of the native ones (this is for video).
(closes issue #11366)
Reported by: ovi


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@89573 65c4cc65-6c06-0410-ace0-fbb531ad65f3