OkHttp span details

[marandaneto]

📜 Description

💡 Motivation and Context

More HTTP details for the OkHttp integration.
Context: https://medium.com/okcredit/how-okcredit-android-app-boosted-network-performance-by-30-84109080c065

💚 How did you test it?

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• No breaking changes

🔮 Next steps

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- OkHttp span details ([#2158](https://github.com/getsentry/sentry-java/pull/2158))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

Generated by 🚫 dangerJS against 76751d9

[philipphofmann]

This looks awesome, @marandaneto.

[marandaneto]

Closed in favor of #2659