Apparently they can be disabled with any NFC enabled device: https://apple.com/newsroom/2021/04/apple-introduces-airtag/

>[...] And even if users don’t have an iOS device, an AirTag separated from its owner for an extended period of time will play a sound when moved to draw attention to it. If a user detects an unknown AirTag, they can tap it with their iPhone or NFC-capable device and instructions will guide them to disable the unknown AirTag.

It is better supported on iPhones, but that's acceptable:

>iOS devices can also detect an AirTag that isn’t with its owner, and notify the user if an unknown AirTag is seen to be traveling with them from place to place over time.

I'd like this detection to come in stock Android, similar to how the Contact Tracing thing was shared b/w Apple/Google.