presence-chooser: use the account-manager directly to get our state and status
presence-chooser: use the account-manager directly to get our state and status

Also wait that the AM is ready before trying to get the status. Partially fix
bug #601235.

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