/usr/lib/x86_64-linux-gnu/libpackagekit-glib2.so is in libpackagekit-glib2-dev 1.1.9-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpackagekit-glib2.so.18.1.3
/usr/lib/x86_64-linux-gnu/libpackagekit-glib2.so.18.1.3