/usr/lib/x86_64-linux-gnu/libart_lgpl_2.so is in libart-2.0-dev 2.3.21-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libart_lgpl_2.so.2.3.21
/usr/lib/x86_64-linux-gnu/libart_lgpl_2.so.2.3.21