Hello,
Not sure if anyone is still interested in this topic however it's a pretty good idea.
Unfortunately the software skills required to do it would be pretty advanced and would likely require quite a bit of time which most people don't have.
I propose an alternate possibility.
Many of the newer Android devices are coming equipped with HDMI outputs. For example the Droid X & HTC Evo both support HDMI out. Unfortunately, there appears to be some disconnect in the software support of what can be outputted onto a screen however this is a big complaint amount android users and will likely be worked around in the near future. (based upon android forums i've read).
HDMI to Composite converter - http://www.hdtvsupply.com/hdmi-to-compo ... apter.html - this one is expensive however I'm sure a good google search can find you something cheaper.
I've used similar products in the past to convert BNC to Composite, hardware converters work OK but there is some loss in quality.
While this would not be a 100% solution it is a good idea for a work around in the sense that it could potentially at least have your AVIC screen mirror whatever your phone is outputting. This would work very well for something like, say, slingplayer or other video streaming. It would also be functional for using google maps and other android apps. The downside is you'd still be interacting with everything through the phone rather than touch screen on the AVIC.
I don't think it would be very easy to have the AVIC send the screen touch commands to the phone (using USB) however if you could, this would solve the problem...
As soon as the HDMI output issue is solved I plan to get a converter and actively try experimenting with this. At the moment all you can do is watch recorded videos / youtube / few other things so it's kinda not worth it.
mclovin