Attempts to improve the RTP packet queue/the audio jitter buffer with resepect to recovery when the queue/buffer is full. Works on bringing uniformity to the media processing threads created by FMJ and libjitsi as part of an effort to resolve quality degradation made very audible by jitsi-videobridge.

git-svn-id: https://svn.java.net/svn/jitsi~svn/libjitsi@10777 198c5059-ef06-4ec0-9a75-fdd6b0ef00a6