fix(ios): support 'url' prop for ShapeSource on iOS

[HarshaZeitview]

Description

support 'url' prop for ShapeSource on iOS

Fixes #3863

Added your feature that allows ...

Checklist

• [X] I've read CONTRIBUTING.md
• [ ] I updated the doc/other generated code with running yarn generate in the root folder
• [ ] I have tested the new feature on /example app.
  • [ ] In V11 mode/ios
  • [ ] In New Architecture mode/ios
  • [ ] In V11 mode/android
  • [ ] In New Architecture mode/android
• [ ] I added/updated a sample - if a new feature was implemented (/example)

Minimal fix, tested in own app (Android / iOS)