Then take your powered-off Android phone and hold the volume down button. While you're still holding the volume down button, plug in your USB-C cable, and then plug that cable into your Windows PC .

Carsifi has a USB-C port instead of a fixed cable. The special “trick” for Carsifi is that it has a “magic button” that can control which phone is powering Android Auto in your car.

You could make it so that long-pressing your phone’s volume-down button summons Google Assistant and long-pressing volume-up opens your system settings or maybe an app you access often.