title: Android button with selector background doesn't load landscape drawables
body: <p>I've set up a button with an xml selector background. The drawables are located in different versions at drawable-xhdpi and at drawable-land-xhdpi.
  Problem is on rotation change to landscape the buttons aren't assigned with the land version.
  <br><br>the button looks like this:</p>
  
  <pre><code>&lt;Button android:id="@+id/home_button"
                              android:layout_height="wrap_content"
                              android:layout_width="wrap_content"
                              android:layout_alignParentBottom="true"
                              android:layout_marginBottom="0dp"
                              android:background="@drawable/xml_selector_home"
                              android:layout_toRightOf="@+id/fwd_button"
                              android:layout_weight="1"&gt;
                      &lt;/Button&gt;
  </code></pre>
  
  <p><br>the button drawable looks like this:
      
  </p>
  
  <pre><code>&lt;item android:state_pressed="true" android:drawable="@drawable/homeon"/&gt;
  &lt;item android:drawable="@drawable/homeoff"/&gt;
  </code></pre>
  
  <p></p>