Android Chromoting: Remove title and add navigation button to disconnect

remoting/android/java/res/values-v17/styles.xml

 <?xml version="1.0" encoding="utf-8"?>
 
 <!-- Copyright 2014 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.
 -->
 
 <resources>
     <style name="BaseTheme" parent="@style/Theme.AppCompat.Light">
         <item name="colorPrimary">#E0E0E0</item>
         <item name="colorPrimaryDark">#616161</item>
     </style>
     <style name="BaseTheme.NavigationDrawer" parent="@style/BaseTheme">
         <item name="windowActionBar">false</item>
         <item name="android:windowDrawsSystemBarBackgrounds">true</item>
     </style>
+    <style name="BaseTheme.Desktop" parent="@style/BaseTheme">
+        <item name="actionBarStyle">@style/ActionBar.Desktop</item>
+    </style>
+
+    <style name="ActionBar.Desktop" parent="@style/Widget.AppCompat.ActionBar">
+        <item name="displayOptions">homeAsUp</item>
+    </style>
 
     <style name="EmptyStateText" parent="@android:style/TextAppearance.Large">
         <item name="android:textColor">#888</item>
     </style>
     <style name="EmptyStateText.Hyperlink" parent="@style/EmptyStateText">
         <item name="android:textColor">@android:color/holo_blue_light</item>
         <item name="android:textStyle">italic</item>
     </style>
 </resources>