Merge pull request #40 from callstack/fix/java-guide-fragments

Tweak java guide fragments import

Author: dratwas

docs/JAVA.md

@@ -251,7 +251,7 @@ Examples:
 An fragment rendering `ReactRootView` with a given module name.  It automatically uses an instance of a bridge created in `startReactNative` method. It works well with exposed JavaScript module. All the lifecycles are proxied to `ReactInstanceManager`. It's the simplest way to embed React Native into your navigation stack.
 
 ```java
-  import com.callstack.reactnativebrownfield.ReactNativeActivity;
+  import com.callstack.reactnativebrownfield.ReactNativeFragment;
 ```
 
 ---
@@ -272,28 +272,28 @@ Params:
 Examples: 
 
 ```java
-  ReactNativeActivity.createReactNativeFragment("ReactNative");
+  ReactNativeFragment.createReactNativeFragment("ReactNative");
 ```
 
 ```java
   Bundle bundle = new Bundle();
   bundle.putInt("score", 12);
 
-  ReactNativeActivity.createReactNativeFragment("ReactNative", bundle);
+  ReactNativeFragment.createReactNativeFragment("ReactNative", bundle);
 ```
 
 ```java
   HashMap map = new HashMap<String, *>();
   map.put("score", 12);
 
-  ReactNativeActivity.createReactNativeFragment("ReactNative", map);
+  ReactNativeFragment.createReactNativeFragment("ReactNative", map);
 ```
 
 ```java
   WritableMap map = new WritableMap();
   map.putInt("score", 12);
 
-  ReactNativeActivity.createReactActivityIntent(context, "ReactNative", map);
+  ReactNativeFragment.createReactActivityIntent(context, "ReactNative", map);
 ```
 
 ---