Questions regarding sensors and Android Auto, or how to better automate opening the garage door?

I have an automation that opens the garage door. When I enter my home zone, it does a few checks and then sometimes opens the garage door for me.

If one of the following is true, it opens:

• phone activity = in_vehicle (device activity pulled from the companion app)
• phone BT connection includes <old car>
• phone BT connection includes <new car>

This worked almost perfectly until recently when we got a new vehicle with Android Auto. Provided I'm driving, my phone used to be connected via BT 100% of the time, and thus my garage would open automatically. The "in_vehicle" activity is slow to update so if I am driving <15min, it does not always think I'm in a vehicle, and is thus unreliable. And even when I bike, it often thinks I'm "walking" and not cycling, so that barely works as well.

With the new car, I am now more likely to be connected to Android Auto via USB (no BT AA support). Based on the garage not opening anymore, I assume it's not connected via BT once I am plugged into Android Auto.

So what can I do? Is there some HA can check if my phone is connected to Android Auto?