Generates code of missing R class

[bagipro]

Hi, there are a few things:

• generated code isn't getting saved by some reason
• I believe it's not an issue that I don't create inner classes?
• I mentioned arrays in original R classes like public static final int[] ZoomOval = new int[0];, I will find out why they exist, and add it in a new commit in future

This PR is for #308

[ghost]

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Happy coding!

[skylot]

@sergey-wowwow I merged your commit and made some changes to fix tests and generation of R class.
Short description of current R class processing:

• if R class not found in app package (read from manifest) it will be generated
• all resources fields will be added to that class
• in result, all resources ids will be reference to that R class
• if original R class is located in another package it will not be used (actually there are can be int array fields which not redirected for now - need to fix)
• all const fields replacement (including resources) can be disabled using --no-replace-consts option

I hope it will fix your issues with resource ids replacements

[skylot]

🎉 This PR is included in version 0.9.0 🎉

The release is available on GitHub release

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