To replicate:

Using latest Flutter plugin 3.4.1 and the ‘purchase_tester’ example project

Add an ElevatedButton that calls canMakePayments() 
eg replace the ‘UpsellScreen’ build method with this

@overrideWidget build(BuildContext context) {  return ElevatedButton(    onPressed: () async {      bool _storeAvailable = false;      try {        print("Checking availability");        _storeAvailable = await Purchases.canMakePayments();        print("Store available? $_storeAvailable"); //This line never prints      } on PlatformException catch (e) {        var errorCode = PurchasesErrorHelper.getErrorCode(e);        print("Error was $errorCode");      }    },    child: Text("Check Store Available"),  );}

On Android the call never returns (on iOS it works as expected)

Expected result:
bool returned within a reasonable time (or an exception)

Testing info:
This function was working correctly on vs 3.3.0 of the plugin.

Tested on Android Pixel 4a
Flutter (Channel stable, 2.2.3, on macOS 11.4 20F71 darwin-x64)