ProgressDialog (threeds2 API)

```
public interface ProgressDialog
```
This interface represents the processing screen that the App may show while communicating with the 3DS server. It will only be shown once, after hidden or if the Activity is recreated the app need to request a new instance to show.
Created by Ran Haveshush on 08/10/2018.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`hide()` Hides the processing screen.
`void`	`show()` Shows the processing screen.

Interface ProgressDialog