/usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so is in libpulse-dev 5.0-13.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0.0.5
/usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0.0.5