title: Xamarin.Forms Android Tabbar custom with Icon and Text
body: <p>I have checked and implemented with following links:
  <a href="https://stackoverflow.com/questions/21933755/android-action-bar-tabs-styling-the-icon-and-text-together">Android Action Bar Tabs, Styling the Icon and Text together</a>
  And now I can see image above text. I want to increase the height of tabbar so that the icon have larger size.
  I also checked <a href="https://stackoverflow.com/questions/17439683/how-to-change-action-bar-size">How to change action bar size</a> &amp; <a href="https://blog.xamarin.com/material-design-for-your-xamarin-forms-android-apps/" rel="nofollow noreferrer">https://blog.xamarin.com/material-design-for-your-xamarin-forms-android-apps/</a>. And I tried to implement AppCompatActivity in my Xamarin.Forms project.
  At first, android activity was derived from <code>global::Xamarin.Forms.Platform.Android.FormsApplicationActivity</code> and now it is converted to <code>global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity</code>.
  And the custom Renderer was implemented for <code>TabbedPage</code>. I know it must be converted to <code>TabbedPageRender</code> for <code>AppCompatActivity</code>. So I updated the renderer too.
  But now the custom renderer is not being called. And I can't change the height of Tabbar that is placed in <code>ActionBar</code> for <code>AppCompatActivity</code>.
  Let me know what I implemented wrong.
  Thank you.</p>