Android Chromoting: Add hooks for the official account-switcher

remoting/android/java/src/org/chromium/chromoting/accountswitcher/AccountSwitcher.java

 // 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.
 
 package org.chromium.chromoting.accountswitcher;
 
+import android.content.Intent;
 import android.view.View;
 
 /** Common interface for account-switcher implementations. */
 public interface AccountSwitcher {
     /** Interface for receiving notifications from the account-switcher. */
     public interface Callback {
         /**
          * Called when the user has selected an account, or after the initial loading of the
          * device's accounts list, to notify the app that a current valid account is selected.
          * @param accountName The e-mail identifier of the selected account.
@@ skipping 48 matching lines @@
      * accounts.
      */
     String[] getRecentAccounts();
 
     /**
      * Reloads the list of accounts on the device. Called from the activity's onStart() method
      * (or whenever the device's accounts-list might have changed). This will notify the callback
      * that a valid account is selected, or that the list is empty.
      */
     void reloadAccounts();
+
+    /**
+     * This should be called from the controlling activity's onActivityResult() method. It allows
+     * the account-switcher implementation to launch a child Activity and handle the result.
+     */
+    void onActivityResult(int requestCode, int resultCode, Intent data);
+
+    /**
+     * Releases any resources used by the account-switcher. Should be called by the activity's
+     * onDestroy() method.
+     */
+    void destroy();
 }