Contact card fixes

- Move call to TabScrollManager until tab carousel is initialized
(this will allow contact with social updates to scroll + pin header)
- Bring back overlay / touch interceptor on phone landscape
so updates fragment will be dimmed out when it's not the current page
- Remove windowContentOverlay=null on contact detail activity
so the shadow appears below action bar

Bug: 5144095

Change-Id: I206e83906b89c5de0d8860e1bfc89c31b4f638b7