[ChromeVox] Convert LogTypes to TypeScript

AX-Relnotes: n/a.
Bug: b/267329383
Change-Id: If4f428650f27bcaa5f390f7027810f10f046482e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5568395


Reviewed-by: Jacob Francis <francisjp@google.com>
Commit-Queue: Anastasia Helfinstein <anastasi@google.com>
Cr-Commit-Position: refs/heads/main@{#1313076}