/lib/udev/rules.d/90-uinput.rules is in libgaminggear0 0.15.1-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | ACTION=="add|change", KERNEL=="uinput", TAG+="uaccess"
ACTION=="add|change", KERNEL=="uhid", TAG+="uaccess"
|