DirectSocket panel #4

All DirectSocket UDP protocol methods are added to NetworkManager.ts
with tests.

The next CL will cover UI regarding UDP/TCP messages.

The previous related CL's for TCP:
https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6316791
https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6461928

Change-Id: I1ba4b9794ff4892e2119d553fcdf4dc724d586b5
Bug: 358327120
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6495446
Reviewed-by: Danil Somsikov <dsv@chromium.org>
Reviewed-by: Alex Rudenko <alexrudenko@chromium.org>
Commit-Queue: Vlad Krot <vkrot@google.com>

Author: vkrot-cell