as a totally tangentially related thing, we just released a proof of concept version of kodi with java on aarch64 for android. i.e. first time in the open source world one can play blurays on a 64 bit arm android os with full java menus (well, that's mostly the nvidia shield pro 2019, but should be extensible to 32 bit android as well).

https://forum.kodi.tv/showthread.php?tid=360250