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Also, mark status bar tooltip bubbles as ignored for PIP collision
detection using this mechanism.

Bug: b/127838266
Test: unit test
Change-Id: I02d4fb093199eef97f29dc1283105f12b36cbe1f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1530275
Commit-Queue: Eliot Courtney <edcourtney@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#645233}