Settings: use CMHW serial number

See http://review.cyanogenmod.org/57164

Change-Id: If328ca7b487435b88246d1f8c47b04770183f09e
Merge "Settings: use CMHW serial number" into cm-11.0
Merge branch 'cm-11.0' into martincz
mokee modify

Change-Id: I5ff636980259cc26fde56138eddd4418137eff60