Make access levels consistently protected on JavaAssets internals
Make access levels consistently protected on JavaAssets internals

This is in order to allow JavaAssets to be sanely extended.

tinkerstudent/playn,thecocce/playn-1,tinkerstudent/playn,longtaoge/playn,ruslansennov/playn2,ruslansennov/playn2,playn/playn,playn/playn,playn/playn,rachelharvey/playn,rachelharvey/playn,thecocce/playn-1,longtaoge/playn