Fix comment in open source MainActivity

Reviewed By: mkonicek

Differential Revision:D2923275
Ninja: ninja

fb-gh-sync-id: 1a6700853a1b292c3ae3dd17f2b3e8ce4a2755cf
shipit-source-id: 1a6700853a1b292c3ae3dd17f2b3e8ce4a2755cf

local-cli/generator-android/templates/package/MainActivity.java

@@ -28,9 +28,9 @@ public class MainActivity extends ReactActivity {
     }
 
     /**
-    * A list of packages used by the app. If the app uses additional views
-    * or modules besides the default ones, add more packages here.
-    */
+     * A list of packages used by the app. If the app uses additional views
+     * or modules besides the default ones, add more packages here.
+     */
     @Override
     protected List<ReactPackage> getPackages() {
         return Arrays.<ReactPackage>asList(