/usr/lib/libXsettings-client.so is in libxsettings-client-dev 0.17-6ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libXsettings-client.so.0.0.0
/usr/lib/libXsettings-client.so.0.0.0