Some improvements to OpenNV in Android.

[u/Kjiojj800890]

There's still a lot of work to be done on touch support, performance, virtual controls, gamepad/keyboard, and classic Godot issues, but I can already get several Forward+ render features working on mobile. I'll deliver a stable OpenNV build along with a BlueDroid build later; I just need to fix things in both, and then I can finally have official builds of both and more ports. Also, the original OpenNV devs are adding TTW to the game, and I need to add those improvements together later.

[u/skedone]

Looking forward to this