Move //mojo/services/X/public/... to //mojo/services/X/... (part 3).

mojo/services/notifications/interfaces/notifications.mojom

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [DartPackage="mojo_services"]
 module notifications;
 
 struct NotificationData {
   // Title to be displayed along with the notification, if supported.
   string? title;
@@ skipping 24 matching lines @@
 };
 
 interface NotificationService {
   // Posts a new notification with the information specified in
   // |notification_data| and with any interactions with the notification being
   // communicated to |client|.  |notification| can be used to modify or cancel
   // the notification.
   Post(NotificationData notification_data, NotificationClient? client,
        Notification&? notification);
 };