[TreesInViz] Fix a few cc_unittests expectations.

* LayerTreeHostPictureTestForceRecalculateScales
* LayerTreeHostTestDamageWithScale

In TreesInViz mode, deleting a tiling requires a request to viz and ack
from viz. Therefore, it is delayed comparing with non TreesInViz mode,
leading to different testing behaviors.

TEST=cc_unittests

Bug: 406251942
Change-Id: If92109051778d90dee1da06dd4225279a1ab6a9c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7255625
Commit-Queue: Victor Miura <vmiura@chromium.org>
Auto-Submit: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Victor Miura <vmiura@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1558273}