If you have used the info supplied in my earlier articles here and here I am happy to announce that Adobe has fixed these issues in AIR3.4 and these hacks are no longer necessary.
In fact, if you want to use 32-bit colour in an Android AIR app, you need to ensure that you don't hack the Activity theme as this will result in forcing the app to 16-bit (something that had me scratching my head for a while!).
So thanks to Adobe for that, now if they can just fix the issues with URLLoader on 3.4+ and the ATF issues on nVidia based tablets then my life would get a lot easier...
If anyone from the Adobe AIR team reads this, please contact me! My team uses your product in ways you probably wouldn't believe and we are constantly pushing AIR to the limits of the technology. It would be awesome to partner with you on the issues we find.