MockWebServer HTTP/2 full support

[manusa]

Description

Currently MockWebServer has partial support for HTTP/2 but provides incomplete handshakes. This seems to work for OkHttp, but not for other client implementations.

Provide an MockWebServer alternative with better support for HTTP/2

• Implement a proper handshake response
  • onStream(Http2Stream stream)
  • readRequest(Http2Stream stream)
• Remove hardcoded HTTP/1.1 protocol in the RecordedRequest

MockWebServer is final, however, maybe intercepting PRI method requests can help us deal with the problem.

[stale]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!