chore: update Dimensions API Flow types (#31898)

Summary:
This small PR updates the Flow types used in Dimensions. The following changes has been made:
* generic types has been replaced with types from `NativeDeviceInfo` (which already were used in event subscription update)
* ~simplification of `DisplayMetricsAndroid` by spreading via intersection with `DisplayMetrics` type and removing shared properties~
  > I have tried both notations, but according to the lint, it looks like a Native Modules typing limitation which requires redundancy / code duplication in cases like this.

## Changelog

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[Internal] [Changed] - update Dimensions API Flow types

Pull Request resolved: https://github.com/facebook/react-native/pull/31898

Test Plan: Running `yarn flow` in the workspace yields no errors.

Reviewed By: yungsters

Differential Revision: D29932940

Pulled By: GijsWeterings

fbshipit-source-id: bf97bb972964c585207e2450ccf71d932555e291