Fix memoization for Animated components when no style is passed in

[RandomEngy]

Summary: Any component wrapped via createAnimatedComponent() will always re-render, because it creates a new style object. It's impossible to memoize.

Adding useMemo() here ensures that the style object passed to the underlying object is stable: if no style is passed to the wrapped component, then memoization can work.

Allowing memoization to function when the style object is passed in will require a deeper fix. See https://fb.workplace.com/groups/rn.support/permalink/26084643474490921/

Before: {F1496803038}

After: {F1496805410}

Differential Revision: D56618868

[react-native-bot]

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[react-native-bot]

This PR was closed because it has been stalled for 7 days with no activity.