- replace the PagerTabStrip with a TabLayout (moved to top and scrollable)
- move the date selection to the bottom
- do not update the activity title as the tab name is much more visible now
The notfification APIs now use NotificationSpec as their only parameter, which
contains all information (required and optional ones).
We no longer have separate methods and actions for SMS/EMAIL/GENERIC anymore.
The type of notification is important now, not how we received them technically.