* #15528: sip/audiortp: support asymmetric audio codecs

daemon/src/audio/audiortp/audio_rtp_record_handler.cpp

daemon/src/audio/audiortp/audio_rtp_record_handler.h

daemon/src/audio/audiortp/audio_rtp_session.cpp

daemon/src/iax/iaxvoiplink.cpp

daemon/src/iax/iaxvoiplink.h

daemon/src/managerimpl.cpp

daemon/src/sip/sdp.cpp

daemon/src/sip/sdp.h

daemon/src/sip/sipcall.cpp

daemon/src/sip/sipvoiplink.cpp

daemon/src/sip/sipvoiplink.h

daemon/src/voiplink.cpp

daemon/src/voiplink.h