Adding Android ViroAR stuff

mobile/android/app/src/main/java/com/deightonar/MainApplication.java

@@ -14,6 +14,8 @@ import java.util.List;
 import com.reactnativenavigation.NavigationApplication;
 import com.airbnb.android.react.maps.MapsPackage;
 
+import com.viromedia.bridge.ReactViroPackage;
+
 public class MainApplication extends NavigationApplication {
     @Override
     public boolean isDebug() {
@@ -25,7 +27,8 @@ public class MainApplication extends NavigationApplication {
       // Add additional packages you require here
       // No need to add RnnPackage and MainReactPackage
       return Arrays.<ReactPackage>asList(
-          new MapsPackage()
+        new MapsPackage(),
+        new ReactViroPackage(ReactViroPackage.ViroPlatform.GVR)
       );
     }