Completely new alarm list with in-place editing.

- No longer using separate dialog for setting alarms in the normal workflow.
  Set alarm dialog is still needed to handle external extends. Fate of old
  set alarm activity is still to be decided.
- Removed dialog theme for sw600dp screens.
- Added label edit dialog.
- Added custom on/off button to improve smoothness of clicks by increasing
  hit box of clickable area.

Bug: 6164920
Change-Id: I19567658535f3ec78755328a147376a81d5363a8