Add a Hero widget to the second screen.

1. Create two screens showing the same image

In this example, display the same image on both screens.
Animate the image from the first screen to the second screen when
the user taps the image. For now, create the visual structure;
handle animations in the next steps.

Note:
  This example builds upon the
  Navigate to a new screen and back
  and Handle taps recipes.

2. Add a Hero widget to the first screen

To connect the two screens together with an animation, wrap
the Image widget on both screens in a Hero widget.
The Hero widget requires two arguments:

An object that identifies the `Hero`.
      It must be the same on both screens.

The widget to animate across screens.

3. Add a Hero widget to the second screen