refactor: improve useColorScheme subscription efficiency #38001
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Summary:
motivation: re-rendering
useColorScheme()
hook with what is on the main branch means there is a subscribe + unsubscribe dance happening.related docs: https://react.dev/reference/react/useSyncExternalStore#my-subscribe-function-gets-called-after-every-re-render
Changelog:
Test Plan:
tested locally in an app