factor out enable_and_connect_account()
factor out enable_and_connect_account()

https://bugzilla.gnome.org/show_bug.cgi?id=673162

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