title: Shared Element Transition (Foreground/Background) Issue
body: <p>I would like to know whether it is possible to change the z-order of a shared element transition? Look:</p>
  
  <p>I have a layout with an image, that fills the whole screen. In front of the image is a textbox which shows the title of the image. If I klick on the textbox, the transition to the detail activity starts. Therefore I implemented a shared element transition, in which the fullscreen image animates to a smaller version of itself in the detail view. The picture below illustrates this behaviour.</p>
  
  <p><a href="https://i.stack.imgur.com/KPj0d.png" rel="noreferrer"><img src="https://i.stack.imgur.com/KPj0d.png" alt="enter image description here"></a></p>
  
  <p>My problem now is that in both activities are textboxes, that are placed above the shared element image. And if I went from overview to detail activity, I see the circle textbox with the number only after the shared element transition is finished.
  I would like to place the textbox with the number above the shared element transition, so that I could do an animation on this view element, too. </p>
  
  <p>any idea on how to solve this?</p>