Add a test of the minimum role for popovers
This was missed in the existing set of popover tests.
Bug: 40218886
Change-Id: Id265a70e4f933aa484768509896a9bb156db4868
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5973789
Reviewed-by: Aaron Leventhal aleventhal@chromium.org
Auto-Submit: Mason Freed masonf@chromium.org
Commit-Queue: Aaron Leventhal aleventhal@chromium.org
Cr-Commit-Position: refs/heads/main@{#1375302}