Polish AlarmActivity

Bug: 17300075
Bug: 17366678
Bug: 17372509
Bug: 17372853
Bug: 17394952
Bug: 17408042

- Refactored the alarm activity to remove all jump cuts.
- Added interactive transition when swiping alarm fab.
- Updated UI layout to allow translucent status bar.

Change-Id: I8909ecb26c0963a5273c4af90d34605d0c9bca1d