account-settings: use TpConnectionManager accessors
account-settings: use TpConnectionManager accessors

https://bugzilla.gnome.org/show_bug.cgi?id=677545

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