title: way to programatically determine whether an Android device has a menu button?
body: <p>I need to compensate for the lack of a physical (or even a "soft") menu button on Android 3 tablets.  The app I'm working on generally hides the title bar for its activities, but I can't do that if I want the action bar to appear on a tablet.  Is there something in the API that I can use to determine whether a device has a menu button?</p>
  
  <p>If I can't find such a function, the only thing I can think of to do is to never hide the title bar on Android 3.0 and later, but that bothers me for two reasons:</p>
  
  <ol>
  <li>I believe Android 3.0 (or a later API) will eventually support phones, which will probably have menu buttons</li>
  <li>I would prefer not to hard code that SDK version (perhaps I could never hide the title bar for Android 3.0 and above, but then I run the risk of not hiding the title bar on phones)</li>
  </ol>