/usr/lib/x86_64-linux-gnu/libgnome-desktop-3.so is in libgnome-desktop-3-dev 3.22.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgnome-desktop-3.so.12.2.0
/usr/lib/x86_64-linux-gnu/libgnome-desktop-3.so.12.2.0