Stadia controller bluetooth mode

Taken from https://stadia.google.com/controller/index_en_US.html

# How do I pair my controller using Bluetooth? After switching your controller into Bluetooth mode, press and hold the “Y + Stadia” buttons for 2 seconds to enter pairing mode. The status light will flash orange.

Then, go to the device you want to play on and pair your controller in the settings. Once paired and connected, the status light on the controller will turn solid white.

Congrats! You’re ready to start playing. The next time you turn on the controller, it should automatically connect to the last paired device.