Fix commands with no args

Summary: Fixing a typo

Reviewed By: JoshuaGross

Differential Revision: D16434634

fbshipit-source-id: 72a6b698bcd0ba9c10dfbdf264011e0a31ea06b6

packages/react-native-codegen/src/generators/components/GeneratePropsJavaInterface.js

@@ -107,15 +107,14 @@ function getCommandArguments(
   command: CommandTypeShape,
   componentName: string,
 ): string {
-  const commandArgs = command.typeAnnotation.params
-    .map(param => {
+  return [
+    'T view',
+    ...command.typeAnnotation.params.map(param => {
       const commandArgJavaType = getCommandArgJavaType(param);
 
       return `${commandArgJavaType} ${param.name}`;
-    })
-    .join(', ');
-
-  return `T view, ${commandArgs}`;
+    }),
+  ].join(', ');
 }
 
 function generateCommandsString(