Device Orientation Portrait in either direction (default or upside down)

Hello:

I am working on an app for Android tablets in Air 2.7. I want to restrict the aspect ratio to portrait, but I want to allow it to be upside and well as "default" for portrait. It seems when I set "aspectRatio" to "portrait" in the .xml file, the orientation is restricted to only the "default" and not "upside down".

This was pretty simple on the iPhone, is there a way to allow either orientation for portrait on the Android device?

Thanks!