[@container] Change serialization of general-enclosed in test
There is an open issue saying this needs to be specified[1].
Change the expectation to align with Gecko and Chromium for now, which
both keep the original serialization for general-enclosed.
Change-Id: I1986ae7a7f63c2c63ef841f047034eeccdc3828d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5925360
Commit-Queue: Rune Lillesveen futhark@chromium.org
Reviewed-by: Steinar H Gunderson sesse@chromium.org
Cr-Commit-Position: refs/heads/main@{#1368182}