/usr/lib/x86_64-linux-gnu/libudev.so is in libudev-dev 204-5ubuntu20.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libudev.so.1.3.5
/lib/x86_64-linux-gnu/libudev.so.1.3.5