Update for Flutter 3.10 beta (#1746)

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] All existing and new tests are passing.

---------

Co-authored-by: David Iglesias <ditman@gmail.com>
Co-authored-by: Mark Thompson <2554588+MarkTechson@users.noreply.github.com>
Co-authored-by: John Ryan <ryjohn@google.com>

game_template/lib/src/in_app_purchase/in_app_purchase.dart

@@ -139,7 +139,6 @@ class InAppPurchaseController extends ChangeNotifier {
         case PurchaseStatus.pending:
           _adRemoval = const AdRemovalPurchase.pending();
           notifyListeners();
-          break;
         case PurchaseStatus.purchased:
         case PurchaseStatus.restored:
           bool valid = await _verifyPurchase(purchaseDetails);
@@ -155,16 +154,13 @@ class InAppPurchaseController extends ChangeNotifier {
                 StateError('Purchase could not be verified'));
             notifyListeners();
           }
-          break;
         case PurchaseStatus.error:
           _log.severe('Error with purchase: ${purchaseDetails.error}');
           _adRemoval = AdRemovalPurchase.error(purchaseDetails.error!);
           notifyListeners();
-          break;
         case PurchaseStatus.canceled:
           _adRemoval = const AdRemovalPurchase.notStarted();
           notifyListeners();
-          break;
       }
 
       if (purchaseDetails.pendingCompletePurchase) {