_emit_contact_capabilities_changed: no longer needs the old/new caps
_emit_contact_capabilities_changed: no longer needs the old/new caps

freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut