[in_app_purchase] Android Code Inspection and Clean up (flutter#3120)

* Android Code Inspection and Clean up

* Format

Author: hamdikahloun

packages/in_app_purchase/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.4+13
+
+* Android Code Inspection and Clean up.
+
 ## 0.3.4+12
 
 * [iOS] Fixed: finishing purchases upon payment dialog cancellation.

packages/in_app_purchase/android/src/main/java/io/flutter/plugins/inapppurchase/MethodCallHandlerImpl.java

@@ -115,8 +115,8 @@ public void onMethodCall(MethodCall call, MethodChannel.Result result) {
         endConnection(result);
         break;
       case InAppPurchasePlugin.MethodNames.QUERY_SKU_DETAILS:
-        querySkuDetailsAsync(
-            (String) call.argument("skuType"), (List<String>) call.argument("skusList"), result);
+        List<String> skusList = call.argument("skusList");
+        querySkuDetailsAsync((String) call.argument("skuType"), skusList, result);
         break;
       case InAppPurchasePlugin.MethodNames.LAUNCH_BILLING_FLOW:
         launchBillingFlow(

packages/in_app_purchase/pubspec.yaml

@@ -1,7 +1,7 @@
 name: in_app_purchase
 description: A Flutter plugin for in-app purchases. Exposes APIs for making in-app purchases through the App Store and Google Play.
 homepage: https://github.com/flutter/plugins/tree/master/packages/in_app_purchase
-version: 0.3.4+12
+version: 0.3.4+13
 
 dependencies:
   async: ^2.0.8