Android: Show Action Bar if supported
<p>Is it possible to have the action bar show on systems using the Android 3.0 API or greater, but to gracefully ignore it otherwise (since pre-3.0, handsets required a menu button and an Action Bar wouldn't be necessary).</p>

<p>The showAsAction XML attribute isn't part of the old APIs. I thought of using reflection, but there's no setShowAsAction() method or equivalent for menu items.</p>
