Minimize DB access in ag_account_list_enabled_services()
Minimize DB access in ag_account_list_enabled_services()

If the account has been created from another instance, we have all the service
settings already in memory: there's no need to query the DB to get them.

plotters/accounts-sso.libaccounts-glib,plotters/accounts-sso.libaccounts-glib,plotters/accounts-sso.libaccounts-glib