media-factory: stop using gabble_jingle_session_get_peer_handle
media-factory: stop using gabble_jingle_session_get_peer_handle

mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble