XF\Job\Notifier does not use extendClass before calling createForJob static function

[XFFA.IR Bot]

Unlike how Entity::getStructure can be overridden by class extensions, XF\Service\AbstractNotifier::createForJob is directly called without going via extendClass to resolve to the extended notifier to call the static function.

Thankfully the notifier that gets created by the \XF::service() does call extendClass