fix: make compatible with admin delegation settings

Fallback of:
- nextcloud/server#55261

Fixed:

PHP Fatal error:  Class OCA\Guests\FilteredSettingsManager contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (OCP\Settings\IManager::getAdminDelegatedSettings) in /var/www/html/apps-extra/guests/lib/FilteredSettingsManager.php on line 14

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

lib/FilteredSettingsManager.php

@@ -58,6 +58,10 @@ public function getAdminSettings($section, bool $subAdminOnly = false): array {
 		return $this->manager->getAdminSettings($section, $subAdminOnly);
 	}
 
+	public function getAdminDelegatedSettings(): array {
+		return $this->manager->getAdminDelegatedSettings();
+	}
+
 	public function getAllowedAdminSettings(string $section, IUser $user): array {
 		return $this->manager->getAllowedAdminSettings($section, $user);
 	}