Latest LOS build clean flashed along with the new OpenGapps 11.0 nano version (which includes AA stub).
Working flawlessly here
Really working flawlessly with the media system of your car?
Then you'd be the first one who got it to work.
Just to be clear: It's not about AA working standalone on the smartphone. Therefore no clean flash is needed. This works for me too and I dirty flashed it. I see no reason atm to perform a clean flash the device just for AA.