Updated codecs may be a subset of local codecs.
Updated codecs may be a subset of local codecs.

Olivier pointed out that the codecs passed to CodecsUpdated need only be
a subset of those passed to Ready/SetLocalCodecs, because they're the
intersection of those and the remote codecs.

mlundblad/telepathy-gabble,mlundblad/telepathy-gabble,community-ssu/telepathy-gabble,community-ssu/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,community-ssu/telepathy-gabble,jku/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,community-ssu/telepathy-gabble,jku/telepathy-gabble,Ziemin/telepathy-gabble