Add option to set screen brightness to max while in-game

[nvllsvm]

The DOOM engine games can be fairly dark and from personal experience, are hard to play at lower brightnesses.

There should be an option to set the brightness to max while in game. The default should be off.

Code to be added to Game.java

WindowManager.LayoutParams attributes = getWindow().getAttributes();
attributes.screenBrightness = 1F;
getWindow().setAttributes(attributes);