Set profile fields for system user in Model\User::getOwnerDataById

- Address https://github.com/friendica/friendica/issues/10473#issuecomment-903676606
- This is required when Model\Profile::load is called for the system user for example

src/Module/Profile/Contacts.php

@@ -52,7 +52,7 @@ class Contacts extends Module\BaseProfile
 
 		$is_owner = $profile['uid'] == local_user();
 
-		if (!empty($profile['hide-friends']) && !$is_owner) {
+		if ($profile['hide-friends'] && !$is_owner) {
 			throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
 		}