client-factory: ensure alias, presence, capabilities and avatar are prepared
client-factory: ensure alias, presence, capabilities and avatar are prepared

Sometimes contacts are assumed to have these features prepared, but they
don't always. Ensure they are prepared by the factory.

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