Fixed correct remote media format list under some SIP re-INVITE scenarios.
Fixed ellipsis test around how a literal string is interpreted by the compiler.
Fixed playing sound file on some devices.
Added log of average audio signal level
Attempt to fix a multi-threading crash.
Fixed return status code for SIP OPTIONS in unknown dialog.
Allow the disable of ring back tones being played on PCSS endpoint.
Fixed shut down when have active call and active SIP registration