Prerender: Track the mismatched activation headers

Several prerenders cannot be activated due to kHttpRequestHeader, and
we're figuring out if we can loosen the restrictions.

This CL records the missing headers when PrerenderHost fails to match
the navigation parameters due to kHttpRequestHeader, and reports a
hashed result to UMA.

Fuchsia-Binary-Size: Size increase is unavoidable.
Bug: 1378921
Change-Id: Ie827d15140e7feff5a354cd8da8f84ec363873b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3985990
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Commit-Queue: Lingqi Chi <lingqi@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1068508}