This thread has a ton of helpful info in it. I tried this fix and it seemed to work OK when I re-installed the HU. However, I didn't test out pairing or android auto with it. Something seems to be wrong with the FW image. But I don't know what that could be. Here are my symptoms:
Unit starts up fine and will play radio and displays reverse camera.
I can pair my pixel 7 pro to the unit via bluetooth and it shows a successful pairing.
I can play Pandora by itself from the HU via bluetooth as long as Pandora is started up on the phone.
I get the option to start Andr