queryProductDetails() from InAppPurchase package awaits forever and never returns after integrating purchases_flutter

Hey ​@almuhannad-a7d70c !

This is a known conflict when using both packages together. Both purchases_flutter and in_app_purchase initialize their own connection to Google Play Billing, and the billing service can only handle one active connection at a time. This can cause either paths to blocks from completing its queries, which is why the call hangs indefinitely.

The fix is here would be to drop in_app_purchase and use RevenueCat's SDK only fetching products.

Let me know if you hit any issues still though! Be sure to clean all caches too when adding/removing dependencies, to be sure nothing still lingers.

Best,