Revert of arc-bridge: Move most methods to Mojo interfaces

components/arc/common/settings.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.
-
-module arc;
-
-interface SettingsInstance {
-  // Send an Android broadcast message to the Android package and class
-  // specified.  Data can be sent as extras by including a JSON map string which
-  // will be automatically converted to a bundle accessible by the receiver.
-  //
-  // Note: Broadcasts can only be sent to whitelisted packages.  Packages can be
-  // added to the whitelist in ArcBridgeService.java in the Android source.
-  SendBroadcast(string action,
-                string package,
-                string cls,
-                string extras);
-};
-