/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/security/java.policy is in openjdk-8-jre-headless 8u162-b12-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /etc/java-8-openjdk/security/java.policy
/etc/java-8-openjdk/security/java.policy