title: Android Studio: Extension Methods are not supported at this language level
body: <p>The following code produced the error 
  "Extension Methods are not supported at this language level"
  in android studio:</p>
  
  <pre><code>public interface Test {
   static String Test2(String A) {
      return "";
      }
  }
  </code></pre>
  
  <p>AS 2.0 Beta 2</p>
  
  <p>What have I done wrong?</p>