test(mobile): takeover tests for light-mode chip contrast

Takeover tests for #22585: the two contrast behaviours (light themes read at
4.5:1, dark and saturated Material You surfaces keep the shared accents),
rewritten with static imports and deduplicated accents.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
5a9c6a73ecJulius Marminge committed on 10/21/2026, 6:39:31 AMparentf5e15e6
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