Rename app-generated to z-app-generated, because macOS Contacts supports only one and will pick the first one alphabetically

Signed-off-by: Georg Ehrke <developer@georgehrke.com>

apps/contactsinteraction/lib/AddressBook.php

@@ -34,7 +34,6 @@ use OCA\DAV\DAV\Sharing\Plugin;
 use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\IL10N;
 use Sabre\DAV\Exception\NotFound;
-use Sabre\DAV\Exception\NotImplemented;
 use Sabre\DAV\PropPatch;
 use Sabre\DAVACL\ACLTrait;
 use Sabre\DAVACL\IACL;

apps/dav/lib/CardDAV/Integration/ExternalAddressBook.php

@@ -34,7 +34,7 @@ use Sabre\DAV;
 abstract class ExternalAddressBook implements IAddressBook, DAV\IProperties {
 
 	/** @var string */
-	private const PREFIX = 'app-generated';
+	private const PREFIX = 'z-app-generated';
 
 	/**
 	 * @var string