[Bug]: `shouldStringifyDatesInCalls` should apply to both directions

### Capacitor Version

💊 Capacitor Doctor 💊

Latest Dependencies:

@capacitor/cli: 5.7.0
@capacitor/core: 5.7.0
@capacitor/android: 5.7.0
@capacitor/ios: 5.7.0

Installed Dependencies:

@capacitor/cli: 5.4.2
@capacitor/android: 5.4.2
@capacitor/core: 5.4.2
@capacitor/ios: 5.4.2

[success] iOS looking great! 👌
[success] Android looking great! 👌

### Other API Details

_No response_

### Platforms Affected

- [X] iOS
- [ ] Android
- [ ] Web

### Current Behavior

The [Capacitor Firebase Firestore](https://capawesome.io/plugins/firebase/cloud-firestore/) plugin must be able to distinguish between strings and date objects both incoming and outgoing.
I use [`shouldStringifyDatesInCalls`](https://capacitorjs.com/docs/core-apis/data-types#dates) to prevent JS date objects from being converted to strings. Unfortunately, this only works incoming, not outgoing.

### Expected Behavior

If I return a Date object on Android (see https://github.com/ionic-team/capacitor/issues/7252) or iOS and the [`shouldStringifyDatesInCalls`](https://capacitorjs.com/docs/core-apis/data-types#dates) is set to `false`, then I expect a JS date object at JS level.

### Project Reproduction

https://github.com/robingenz/capacitor-firebase-plugin-demo

### Additional Information

See https://github.com/robingenz/capacitor-firebase-plugin-demo/blob/676a3ea77190011b1951f7e9e983156467cf9a77/src/app/modules/firebase-firestore/firebase-firestore.page.ts