Filter out Android system packages from Chrome OS notification settings.

components/arc/common/app.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: 11
+// Next MinVersion: 12
 
 module arc.mojom;
 
 import "scale_factor.mojom";
 import "screen_rect.mojom";
 
 // Describes ARC app.
 struct AppInfo {
   string name;
   string package_name;
   string activity;
   [MinVersion=2] bool sticky;  // true if the app cannot be uninstalled
   [MinVersion=7] bool notifications_enabled;
 };
 
 // Describes ARC package.
 struct ArcPackageInfo {
   string package_name;
   int32 package_version;
   int64 last_backup_android_id;
   int64 last_backup_time;
   bool sync;  // true if package installation should be synced
+  [MinVersion=11] bool system;  // true if package is system package.
 };
 
 // Describes ARC app shortcut.
 struct ShortcutInfo {
   string name;
   string package_name;
   string icon_resource_id;
   string intent_uri;
 };
 
@@ skipping 126 matching lines @@
                                            ShowPackageInfoPage page,
                                            ScreenRect dimension_on_screen);
 
   // Sets notification setting for the package.
   [MinVersion=6] SetNotificationsEnabled@10(string package_name, bool enabled);
 
   // Sends a request to ARC to uninstall the given package.  Error (if ever
   // happens) is ignored, and uninstall option should appear in the UI.
   [MinVersion=2] UninstallPackage@5(string package_name);
 };