Ability to redirect logs to a java callback

[bsia]

I have a user who I've diagnosed to have object-box-related issues. I can send him debug builds with the ObjectBox debug flags (debugFlags(), debugRelations(), etc...) turned on. However, I would like to redirect the object box logs to a callback where I can collect all the ObjectBox logs and save them to a file for later processing.

Edit: Original discussion at https://stackoverflow.com/q/64616858/9187282