Glic actor: Still provide observations after the first action is blocked

Since the safety check happens before the tool creation, the tab was not
associated with the task, so the client did not get an observation, and
without that, it can't fail gracefully.

Bug: 443956362
Change-Id: I62ef241ed9ee55344f0156b3254a031d64a77d81
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6944328
Auto-Submit: Kevin McNee <mcnee@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1515478}