Record whether apphelp.dll is loaded to tracing metadata

Two other CLs will be created. One recording a UMA metric for whether AppHelp is loaded at GPU init time, and another adding this UMA metric for more processes than just the GPU one.

Bug: 1350257
Change-Id: Ib85a887377cc294c879334c30487622e18925c7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3855137


Reviewed-by: Etienne Bergeron <etienneb@chromium.org>
Commit-Queue: Stephen Nusko <nuskos@chromium.org>
Auto-Submit: Sean Maher <spvw@chromium.org>
Reviewed-by: Stephen Nusko <nuskos@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1042259}