How do I run a binary program without showing the gear icon?

I created a automator workflow, add a Run Shell Script part and put these lines in:

/Users/xxx/Library/Android/sdk/tools/android avd

I saved it as an app and it works.

But I will always see a gear icon on the menu bar.

I tried to put a & or nohup, if so the program won't start.

Any ideas? The android I'm trying to execute is a shell script