fix(dav): default calendar and address book not created on first login

[st3iny]

• Resolves: none

Summary

Required for nextcloud/calendar#6648

The first login hook was not triggered because the event was not checked against the correct class via instanceof.

Consider the following code snippet further down:

server/apps/dav/lib/AppInfo/Application.php

Lines 217 to 222 in a2c59d2

	// first time login event setup
	$dispatcher->addListener(IUser::class . '::firstLogin', function ($event) use ($hm): void {
	if ($event instanceof GenericEvent) {
	$hm->firstLogin($event->getSubject());
	}
	});

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[st3iny]

/backport to stable31

[st3iny]

/backport to stable30

[st3iny]

/backport to stable29

[tcitworld]

🙈