add check for JavaScriptImplementation annotation in order to prevent unnecessary exception

Author: Mihail Slavchev

build-artifacts/project-template-gradle/src/main/java/com/tns/RuntimeHelper.java

@@ -149,7 +149,10 @@ public static Runtime initRuntime(Application app)
 
 			try {
 				// put this call in a try/catch block because with the latest changes in the modules it is not granted that NativeScriptApplication is extended through JavaScript.
-				Runtime.initInstance(app);
+				JavaScriptImplementation jsImpl = app.getClass().getAnnotation(JavaScriptImplementation.class);
+				if (jsImpl != null) {
+					Runtime.initInstance(app);
+				}
 			}
 			catch (Exception e) {
 				if (logger.isEnabled()) {