Fixed compatibility with HTC Sense devices

updateAlarm method is located in class HtcPhoneStatusBarPolicy on HTC Sense
updateAlarm method has a slightly different handling of the alarm icon as the icon is added or removed depending on the alarm state
The timeout for sending the broadcast is 100ms on HTC Sense as the WorldClock app is sending the ALARM_CHANGED broadcast long before setting NEXT_ALARM_FORMATTED
Merge pull request #1 from chrisch1974/master

Compatibility with HTC Sense