Fixed import type circular references of NativeOrDynamicColorType

[tom-un]

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Description of changes

The previous Pull Request #146 renamed and moved the Flow type NativeOrDynamicColorType. It also created some circular references via the import type imports of this type. Flow itself seems to be able to handle these circular references, but an internal tool in Microsoft cannot. And these circular references are a bad practice.

Created a new file, Libraries/Color/NativeOrDynamicColorType.js, that contains the export type NativeOrDynamicColorType = ... definition. Changed all the import type {NativeOrDynamicColorType} from instances to reference the new file.

Microsoft Reviewers: Open in CodeFlow