[B&A] Wire up forDebuggingOnly reports received from B&A.

Takes fDO reports from B&A servers, and collect/send them on Chrome
side. Also updates lockout/cooldown with server's fDO reports.

Bug: b/356872513

Change-Id: Icbb4af8c6ff901bb08cbbff2b4b9dbea52370986
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5769675
Commit-Queue: Qingxin Wu <qingxinwu@google.com>
Reviewed-by: Russ Hamilton <behamilton@google.com>
Cr-Commit-Position: refs/heads/main@{#1355525}