Add option to skip decoding sources

[spvkgn]

Apktool has option -s,--no-src Do not decode sources. It would be useful to add the same option.

[iBotPeaches]

This tool needs to edit the sources though so perhaps I'm confused why you think it would be useful

[vbarbaresi]

Maybe when apk-mitm is invoked with --skip-patches, it could be slightly faster to use apktool with --no-src? For instance when we know the app doesn't have any certificate pinning in place, we just need to trust user certificates.

I found this issue while looking if this existed, but I have to agree that it's clearly not the main use case.