Any possibility to run wireguard-go with android vpnservice?

[Jason A. Donenfeld]

What you're trying to do has actually already been done and is
available with a nice Java wrapper:

https://git.zx2c4.com/wireguard-android/about/#embedding
https://search.maven.org/artifact/com.wireguard.android/tunnel
https://javadoc.io/doc/com.wireguard.android/tunnel/latest/index.html

This should hopefully save you a bunch of time.