This would be a great tool to have. One thing to watch out for is version incompatibilities, which are a much bigger problem in Android than other frameworks.
Not only that but also devices fragmentation. Google is doing much to address this, but there's still an ocean of troubles in this field.
If a guy would have enough patience and traction to get an "android compatibility framework", he would surely be a hot shot. I'll dig into that maybe :)
Or does that exists already? AFAIK not yet. Any input?