feat: Add more info to the output APK filename

[KobeW50]

This PR aims to add the app name and version to the name of the APK which is saved to external storage. For example, instead of the patched APK being named base-ReX.apk, it may now be named ReX_YouTube_19.05.36.apk.

I have no experience with shell, and I cannot read the code or test it. I imagine that my changes are not enough and will cause issues because I did not take reverse compatibility into account. Please carefully review (and test) the code if you are able to. If not, just close this PR.

Closes https://github.com/decipher3114/Revancify/issues/28