They are, but the MMI is based on QNX right now, so as Apple in car runs on that from blackberry it is likely it may also run on any Android offering that Audi come up with.
All speculation though - we will just have to wait and see. But I suspect given the long list of marques already signed up to Apple in car Audi will feel they have to follow suit despite the Google affiliation.
Audi have a global agreement going forward with the android alliance - google is part of that.
Personally i think its a good thing, i spend more time fixing my 4 iPhones and 5 iPads than anything else.
I can't think of anything worse than having apple in the car.