Fix more Android issues

@clintbellanger @dorkster 

I hope you do not have anything against added comments to save files, which are "magically" usefull.

For https://github.com/clintbellanger/flare-engine/issues/1148
Sorry I got to this late, but this line breaks compiling for me. The problem is that we're passing a float value to `abs()`, which is designed to work with integers. So either we need to cast to int before passing those variables, or we need to use `fabs()`.