Fix sorting string literals in React Native API snapshot (#51916)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/51916

String literals were not sorted in React Native API Snapshot. This diff fixes the issue by retrieving the value from the string literal.

Before:

```ts
type A = {
  a: string;
  b: string;
  \"ba\": string;
  \"ab\": string;
  aFn: () => void;
  bFn: () => void;
  aMethod(): void;
  bMethod(): void;
};
```

After:

```ts
type A = {
  a: string;
  \"ab\": string;
  b: string;
  \"ba\": string;
  aFn: () => void;
  bFn: () => void;
  aMethod(): void;
  bMethod(): void;
};
```

Changelog:
[Internal]

Reviewed By: robhogan

Differential Revision: D76329242

fbshipit-source-id: 9645b82cbd22e2d3acef1376a9ffefa3646457d9