Statusbar: double-tap to sleep (settings part)

Change-Id: Ifb8f1ab1d84ba39942357ee6f8694764799d4103
Merge "Statusbar: double-tap to sleep (settings part)" into cm-11.0
Merge branch 'cm-11.0' of git://github.com/CyanogenMod/android_packages_apps_Settings into cd-4.4