title: Symbol Not Found On OnActionExpandListener
body: <p>I'm adding v4 support to my android application supporting gingerbread and up.  I added ActionBarSherlock, which references Xamarin.Android.Support.v4.  There is also a reference to Mono.Android.Support.v4 too.  I also added the android-support-v4.jar file to the SupportLib folder, and set the Build Action to AndroidJavaLibrary.  However, I'm getting an error I can't get past, which is:</p>
  
  <pre><code>/obj/Debug/android/src/mono/android/support/v4/view/MenuItemCompat_OnActionExpandListenerImplementor.java(41,41): Error:  cannot find symbol
      symbol  : class OnActionExpandListener
      location: class android.support.v4.view.MenuItemCompat
              android.support.v4.view.MenuItemCompat.OnActionExpandListener
  </code></pre>
  
  <p>Why is this error happening?  How can it be resolved?</p>