[Sheriff] Disable flaky FullscreenControlViewTest test

FullscreenControlViewTest.MouseExitFullscreen_TimeoutAndRetrigger is
flaky on lacros. Disable it.

Bug: 1254453
Change-Id: Ia93888addc250198bafd28898eb9276c80f7039d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3372032


Commit-Queue: Devlin Cronin <rdevlin.cronin@chromium.org>
Owners-Override: Devlin Cronin <rdevlin.cronin@chromium.org>
Auto-Submit: Devlin Cronin <rdevlin.cronin@chromium.org>
Reviewed-by: David Bertoni <dbertoni@chromium.org>
Commit-Queue: David Bertoni <dbertoni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#956757}