[Remoting Android] use HelpAndFeedback.launchFeedback to launch the feedback activity

remoting/android/java/src/org/chromium/chromoting/NavigationMenuAdapter.java

 // Copyright 2016 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;
 
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
 
 import org.chromium.chromoting.help.CreditsActivity;
-import org.chromium.chromoting.help.FeedbackSender;
 import org.chromium.chromoting.help.HelpContext;
 import org.chromium.chromoting.help.HelpSingleton;
 
 /**
  * Describes the appearance and behavior of the navigation menu. This also implements
  * AdapterView.OnItemClickListener so it can be used as the ListView's onItemClickListener.
  */
 public class NavigationMenuAdapter extends ArrayAdapter<NavigationMenuAdapter.NavigationMenuItem>
         implements AdapterView.OnItemClickListener {
     /**
@@ skipping 17 matching lines @@
                     @Override
                     public void run() {
                         activity.startActivity(new Intent(activity, CreditsActivity.class));
                     }
                 });
 
         NavigationMenuItem feedbackItem = new NavigationMenuItem(R.menu.feedback_list_item,
                 new Runnable() {
                     @Override
                     public void run() {
-                        FeedbackSender.sendFeedback(activity);
+                        HelpSingleton.getInstance().launchFeedback(activity);
                     }
                 });
 
         NavigationMenuItem helpItem = new NavigationMenuItem(R.menu.help_list_item,
                 new Runnable() {
                     @Override
                     public void run() {
                         HelpSingleton.getInstance().launchHelp(activity,
                                 HelpContext.HOST_LIST);
                     }
@@ skipping 22 matching lines @@
         return convertView;
     }
 
 
     /** AdapterView.OnItemClickListener override. */
     @Override
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
         getItem(position).mCallback.run();
     }
 }