title: I can't set the color of an Android switch in Xamarin.Forms with Styles
body: <p>I am using the following XML to try and change the colors of a switch in my Xamarin forms application. However nothing changes. <br> Can anyone give me any advice on what I might be doing wrong:     </p>
  
  <pre><code>&lt;style name="MyTheme" parent="MyTheme.Base"&gt;
  &lt;/style&gt;
  &lt;!-- Base theme applied no matter what API --&gt;
  &lt;style name="MyTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar"&gt;      
      &lt;item name="windowActionBar"&gt;false&lt;/item&gt;
      &lt;item name="android:actionBarSize"&gt;45dp&lt;/item&gt;
      &lt;item name="colorPrimaryDark"&gt;#1976D2&lt;/item&gt;
  &lt;/style&gt;
  
  &lt;style name="MyTheme.Switch" parent="Widget.AppCompat.CompoundButton.Switch"&gt;
      &lt;item name="colorControlActivated"&gt;#FF0000&lt;/item&gt;
      &lt;item name="colorControlNormal"&gt;#FF0000&lt;/item&gt;
      &lt;item name="colorControlHighlight"&gt;#FF0000&lt;/item&gt;
      &lt;item name="colorSwitchThumbNormal"&gt;#FF0000&lt;/item&gt;
      &lt;item name="colorAccent"&gt;#FF0000&lt;/item&gt;
   &lt;/style&gt;
  </code></pre>
  
  <p>Here's a clip from MainActivity.cs</p>
  
  <pre><code> [Activity(Label = "Japanese", Icon = "@drawable/Icon120", Theme = "@style/MyTheme", MainLauncher = true, 
            ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation,
            ScreenOrientation = ScreenOrientation.Portrait)]
  </code></pre>
  
  <p>As this didn't work I tried some changes but same problem in that it doesn't work:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;resources&gt;
      &lt;style name="CustomTheme" parent="@android:style/Theme"&gt;
          &lt;item name="segmentedControlOptionStyle"&gt;@style/SegmentedControlOption&lt;/item&gt;
          &lt;item name="switchStyle"&gt;@style/SwitchCompat&lt;/item&gt;
      &lt;/style&gt;
  &lt;/resources&gt;
  
  &lt;style name="SwitchCompat" parent="@style/Widget.AppCompat.CompoundButton.Switch"&gt;
      &lt;item name="colorPrimary"&gt;#FFFF00&lt;/item&gt;
      &lt;item name="colorPrimaryDark"&gt;#00FFFF&lt;/item&gt;
      &lt;item name="colorAccent"&gt;#FF00FF&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>