Kill off use off FORCE_LED_WITH_SCREEN_OFF notification flag.

NotificationManager has been fixed to reenable the LED when turning
off the screen.

Change-Id: I232bea3bffd141ea3ca71405b01bc50eb8177bdf
Merge "Kill off use off FORCE_LED_WITH_SCREEN_OFF notification flag." into cm-10.1
Merge branch 'cm-10.1' into martincz