Someone had been working on a plugin for adding BD-J but was only looking at x86. Someone would need to take that work with ARM being the target. You need more then just the JRE as you need to rebuild libbluray to produce libbluray*.jar, so at least the JDE and Apache Ant.
I got so far as installing Zulu as the JDK on my Odroid C2, but haven’t gotten to trying to build libbluray yet.