Fixed preferred color-scheme changes based on embedder color-scheme

When the preferred color-scheme changes as a result of propagating the preferred scheme set by the embedder without changing the preferred color-scheme setting, media queries were not updated.

Call Document::ColorSchemeChanged() to ensure media queries are also updated.

Fixes NTP invalidation issue.

Bug: 364340032 Change-Id: Ie6f2dbdd76f7370414b9a56709fd2bd66be4f589 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5841771 Commit-Queue: Rune Lillesveen futhark@chromium.org Reviewed-by: Stefan Zager szager@chromium.org Cr-Commit-Position: refs/heads/main@{#1352336}