[@container] Test scroll-state() layout changes
States change as a result of layout as well as scroll. Test some layout
changes affecting stuck, snapped, and overflowing.
Bug: 367764865
Change-Id: I8b521feab2aff8ec352bf2862ef6d27cca7a3a16
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5953282
Commit-Queue: Rune Lillesveen futhark@chromium.org
Reviewed-by: Anders Hartvoll Ruud andruud@chromium.org
Cr-Commit-Position: refs/heads/main@{#1373299}