[firebase_core] Fix Android compile warning

packages/firebase_core/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.4.0+7
+
+* Fix Android compilation warning.
+
 ## 0.4.0+6
 
 * Automatically use version from pubspec.yaml when reporting usage to Firebase.

packages/firebase_core/android/src/main/java/io/flutter/plugins/firebase/core/FirebaseCorePlugin.java

@@ -32,7 +32,7 @@ private FirebaseCorePlugin(Context context) {
     this.context = context;
   }
 
-  private Map asMap(FirebaseApp app) {
+  private Map<String, Object> asMap(FirebaseApp app) {
     Map<String, Object> appMap = new HashMap<>();
     appMap.put("name", app.getName());
     FirebaseOptions options = app.getOptions();
@@ -80,7 +80,7 @@ public void onMethodCall(MethodCall call, final Result result) {
         }
       case "FirebaseApp#appNamed":
         {
-          String name = (String) call.arguments();
+          String name = call.arguments();
           try {
             FirebaseApp app = FirebaseApp.getInstance(name);
             result.success(asMap(app));

packages/firebase_core/pubspec.yaml

@@ -3,7 +3,7 @@ description: Flutter plugin for Firebase Core, enabling connecting to multiple
   Firebase apps.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/firebase_core
-version: 0.4.0+6
+version: 0.4.0+7
 
 flutter:
   plugin: