Some visual fixes for when header is in footer position + proper radius

* Uses the radius value from the theme
* Applies that to the header / permission viewWrapper based on orientation
  of the bubbles
* Also swaps position of the divider when its a footer

Test: manual / visual
      - toggle bubbles to show at bottom with a footer and make sure
        rounded corners are in right place

Change-Id: Ieb6db4aedfda125ddf590876aa8b0ee0ee7fc473