Tweak formatting in Android template

Reviewed By: mkonicek

Differential Revision:D2812482
Ninja: Doesn't affect any fb apps or code, purely for open source

fb-gh-sync-id: 4d190354112e3f002405686769dcc409e3394c3c

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

@@ -34,6 +34,7 @@ public class MainActivity extends ReactActivity {
     @Override
     protected List<ReactPackage> getPackages() {
       return Arrays.<ReactPackage>asList(
-        new MainReactPackage());
+        new MainReactPackage()
+      );
     }
 }