UI: Shadow calculation efficiency

WARN (ADVICE) View #10263 of type RCTView has a shadow set but cannot calculate shadow efficiently. Consider setting a background color to fix this, or apply the shadow to a more specific component.

See this [StackOverflow question](https://stackoverflow.com/questions/75355104/view-has-a-shadow-set-but-cannot-calculate-shadow-efficiently-in-react-native).