It should always return false on cocoa platforms, given it's associated with forced-colors.
<rdar://problem/103658875>
Code https://searchfox.org/wubkat/rev/e1e8de31107e64a0ce1f9b344f1fb866f10c9a44/Source/WebCore/css/query/MediaQueryFeatures.cpp#486-513
https://wpt.fyi/results/css/mediaqueries/prefers-contrast.html?label=master&label=experimental&aligned&view=subtest&q=prefers-contrast
Pull request: https://github.com/WebKit/WebKit/pull/30175
Committed 280383@main (807e41dc54b3): <https://commits.webkit.org/280383@main> Reviewed commits have been landed. Closing PR #30175 and removing active labels.