Tiny cleanup in FileUtils.

Use getPath instead of toString. This is more descriptive.

Also just directly return the created Bitmap, no need to make a
separate variable for it.
Make dreamRTC a final constant.

Really nitpicky, but it shows it’s a constant from first glance now.
Fix some array bracket placements. Make them Java style array declarations
Use a SparseIntArray in the Gamepad class instead of a SparseArray type.
Allow GitAdapter to accept a Context. An activity is not explicitly
needed.
Make DirSort a private static final class. It's a Comparator that isn't used elsewhere other than that class.
Remove pointless .equals checks.

Doing [var] != null &&//|| [var].equals(thing) is redundant.
Remove pointless null tests in GL2JNIActivity and GL2JNINative.

indexOf returns a normal int. Boxing to an Integer is pointless.