Hello M Kumar,
There are a few online generators you can use in order to create nine patch splash screen according to the specification
Another option is to use a tool like Photoshop or any other and create the splash screen on your own. Basically, your image should have 1px transparent frame around the content where to mark with black color the pixels you want to be replicated.
The nine patch image format is required only for Android devices so you will have to change only the splash screen from Properties > Android > Splash Screen with your nine patch image.