[@container] Add support for scroll-state(snapped:both)
A new value for snapped when snapped in both directions. This is
sugaring for scroll-state((snapped:x) and (snapped:y)).
Based on request in [1]
Bug: 40279568
Change-Id: I8a1ef18c438810cc38cda64ce59a00517e0ab625
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6022975
Commit-Queue: Rune Lillesveen futhark@chromium.org
Reviewed-by: Anders Hartvoll Ruud andruud@chromium.org
Cr-Commit-Position: refs/heads/main@{#1386118}