I changed it in the .cs files but same problem, this is just digging too deep in a new issue. I went back to my actual project, I found the explanations of the android builds Android Development Reference | Unreal Engine Documentation and I built the one that my phone uses (atc) and it is not crashing now, I guess that was the problem, it was just the wrong build although it says it is for all devices, nevermind it is working now 
Thank you for helping!