updater: dump without crashing in update service proxy for Windows.

Bug: 1473487
Change-Id: I3b6ea9a8742dcf34b4982ef4b4802c7d13b028a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4791287


Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Auto-Submit: Sorin Jianu <sorin@chromium.org>
Commit-Queue: Joshua Pawlicki <waffles@chromium.org>
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Commit-Queue: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1184840}