Merge changes from topic "template_redesign"

* changes:
  Update variable names to reduce confusion.
  Fix/hack MessagingStyle notifications
  Reduce notification minimized height
  Fix the placement of the work profile and feedback badges.
  Fix HUNs
  Remove the unneeded icon spacing in the InboxStyle.
  Hide app name from minimized notifications
  Notification Title is 16pt in Big state
  Ensure headerless notification with large icon is big enough.
  Round corners of BigPicture
  Increase the expand button touchable area.
  Remove the reply action entirely.
  Notification template redesign; part 1.
  Remove night-mode override of notification_divider_height