First of all, thanks for sharing this. However, it will be much insightful if you tell how to edit the lib file, not only posting it because it is actually what the moded APK does. Decompiling the APK and modify the lib file (reverse engineering involved), then re-pack the APK or directly replace the original lib file with modified one as per your post. Using this is virtually the same as using a moded APK.
There are dozens of such files and moded APKs on the internet. Many people refused to use it due to unknown risk. You never know what the author might put into the moded files (can be backdoors that steal your mobile bank info in the worst case). I think what we want to learn is the method of editing that lib files by ourselves.
I mean no offense. It is only my personal perspective of this matter.