I'm pretty sure that the infotainment hack was completely orthogonal to whether it was Beethoven, Iron Maiden, or blissful silence.

Having said that, a successful car infotainment system attack on android auto or apple carplay could, of course, compromise your phone.

So it's up to you whether you decide to cope with that possibility by breaking the law and navigating with a handheld device, or simply declining to do banking on your phone, since successful car exploits mean the attack surface against your phone is much larger than you might presume.