Change Observers: Add WPTs for sync access handles
Adds expectations for all sync access handle methods.
Bug: 341136316
Change-Id: I090eea47fd9472d5a5d6e74df2b7c3b8e6275049
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5741403
Reviewed-by: Daseul Lee dslee@chromium.org
Commit-Queue: Nathan Memmott memmott@chromium.org
Cr-Commit-Position: refs/heads/main@{#1334377}