Enforce use only of TpfPersonas
Enforce use only of TpfPersonas

If we only allow EmpathyContacts to be linked to TpfPersonas, we can
make some assumptions about which interfaces are available on the
personas for efficiency purposes.

GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets