Issue #21: Change getInitialNotification() to work like iOS when no notif is available

README.md

@@ -105,8 +105,9 @@ import com.wix.reactnativenotifications.RNNotificationsPackage;
     protected List<ReactPackage> getPackages() {
         return Arrays.<ReactPackage>asList(
             new MainReactPackage(),
-	  ...
-	  new RNNotificationsPackage(MainApplication.this),
+	        // ...
+	        new RNNotificationsPackage(MainApplication.this)
+        );
 ```
 
 ### Receiving push notifications

example/index.android.js

@@ -89,7 +89,7 @@ class MainComponent extends Component {
   componentDidMount() {
     console.log('ReactScreen', 'componentDidMount');
     PendingNotifications.getInitialNotification()
-      .then((notification) => {console.log("getInitialNotification:", notification); this.setState({initialNotification: notification.getData()});})
+      .then((notification) => {console.log("getInitialNotification:", notification); this.setState({initialNotification: (notification ? notification.getData() : undefined)});})
       .catch((err) => console.error("getInitialNotifiation failed", err));
   }
 

index.android.js

@@ -60,7 +60,7 @@ export class PendingNotifications {
   static getInitialNotification() {
     return RNNotifications.getInitialNotification()
       .then((rawNotification) => {
-        return new NotificationAndroid(rawNotification);
+        return rawNotification ? new NotificationAndroid(rawNotification) : undefined;
       });
   }
 }