title: mvvmcross binding on switch fails on release
body: <p>I have a weird bug in my MVVMCross app.</p>
  
  <p>Considering the following scenario:</p>
  
  <pre><code>&lt;Switch
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:focusable="false"
      android:clickable="false"
      android:layout_alignParentRight="true"
      android:id="@+id/activatedSwitch"
      local:MvxBind="Checked IsActive" /&gt;
  </code></pre>
  
  <ul>
  <li>Compile version: level 14 </li>
  <li>Minimum version:  level 14 </li>
  <li><p>Target version:  level 14</p></li>
  <li><p>Linking: Sdk Assemblies Only</p></li>
  <li><p>Android Phone version is 4.1.2.</p></li>
  </ul>
  
  <p>When I run the app in <strong>Debug</strong> mode, all is ok.</p>
  
  <p>But when I run it in <strong>Release</strong>, the binding to the Checked property failed with the following error:</p>
  
  <blockquote>
    <p>E/MvxBind (11670):   12,70 View type not found - Switch</p>
  </blockquote>