LedControl: fixed AOSP bug preventing LED from working for missed calls
http://code.google.com/p/android/issues/detail?id=62373
When call is not answered and missed call notification is received while
screen is still on because of In Call UI showing; it prevents LED from
triggering (notification LED is ignored by system while screen is on)
Solution: reschedule missed call notification for next screen off to
force desired LED behaviour