Return an array from get_handle_ccs and build_contact_caps
Return an array from get_handle_ccs and build_contact_caps

Creating a new array and passing it in to be filled with caps was pretty
weird, and made it hard to distinguish between "no caps" and "don't
know".

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