Google has turned off its Stadia cloud game streaming service, but it’s giving the wireless Stadia controller a second chance as a Bluetooth controller that can be connected to PCs, Macs, phones, and presumably other devices, too. The change won’t happen automatically; it’s a manual process that can’t be reversed. What’s more, you only have until December 31st, 2023, to do the switch to enable Bluetooth wireless. After that date, any unconverted Stadia controller will still work as…