Add onClick action to notification clock and date

In expanded StatusBar
- clicking clock opens alarms
- clicking date opens calendar - today selected

http://www.youtube.com/watch?v=MLom5e3nQoA

PS3: added turn-blue-on-click
PS4++: nitpicking cleanups

Change-Id: I850732dcca0e65af59ce009aaf9f7ba18bcaf915