arc: Make ChromeVox read an ARC custom notification

components/arc/common/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.
 //
-// Next MinVersion: 8
+// Next MinVersion: 9
 
 module arc.mojom;
 
 import "bitmap.mojom";
 
 // These values must be matched with the NOTIFICATION_EVENT_* constants in
 // com.android.server.ArcNotificationListenerService.
 enum ArcNotificationEvent {
   BODY_CLICKED = 0,
   CLOSED = 1,
@@ skipping 59 matching lines @@
   // on notification update is ignored.
   [MinVersion=5]
   bool use_custom_notification;
   [MinVersion=6]
   ArcBitmap? small_icon;
   // A snapshot image to show before the notification window is created.
   [MinVersion=7]
   ArcBitmap? snapshot_image;
   [MinVersion=7]
   float snapshot_image_scale;
+  // Accessibility text
+  [MinVersion=8]
+  string? accessible_name;
 };
 
 [MinVersion=2]
 struct ArcToastData {
   // Unique identifier
   string id;
   // Toast text.
   string? text;
   // Toast duration in milliseconds. If -1, the toast will be displayed until
   // the dismiss button is clicked.
@@ skipping 33 matching lines @@
   SendNotificationEventToAndroid@1(string key, ArcNotificationEvent event);
 
   // Requests to Android side to create the notification window.
   [MinVersion=7]
   CreateNotificationWindow@2(string key);
 
   // Requests to Android side to close the notification window.
   [MinVersion=7]
   CloseNotificationWindow@3(string key);
 };