msm8960-common: I don't want to see your face

Strengthen the prohibition against face detection as some third
party apps are ignoring it.

Change-Id: I88df1b40f27472b7ed40d745b4b5b59b6d2fa560
Merge branch 'cm-11.0' of github.com:CyanogenMod/android_device_samsung_msm8960-common into cm-11.0