feat: add UDP in HTTP

[imgk]

1. What does this change do, exactly?

Add UDP in HTTP support

2. Please link to the relevant issues.

https://github.com/klzgrad/naiveproxy/issues/617

3. Which documentation changes (if any) need to be made because of this PR?

4. Checklist

• [ ] I have written tests and verified that they fail without my change
• [x] I have squashed any insignificant commits
• [ ] This change has comments for package types, values, functions, and non-obvious lines of code