Converting some preferences to simple menus.

Bug: 18470452
Test: manual - Confirm preferences work as expected

Changed the following preferences to use simple menus:
- Style (Digital or Analog)
- Volume buttons (Snooze, Dismiss, Do nothing)
- Start week on (Saturday, Sunday, Monday)

Change-Id: Iccfd144673e8f19ad34e015c64f0ed2946c61343