pico: Add flag for audio legacy policy fix for hotword
http://review.cyanogenmod.org/#/c/82431

Change-Id: I60dcac3585a98841d80c3c08f6ed31b2fd33d98c
system.prop : clean display props

Change-Id: I58b5e62de4a08a39f78ad4e96d653fb01b53e163