audio: update properties to fix namespace violations

Update properties to add vendor.audio prefix where missing
and remove unused ones to fix namespace violations.

Change-Id: I3723ae3e366178e87eff81001a0f1fd133cc4404
diff --git a/configs/sdm660/sdm660.mk b/configs/sdm660/sdm660.mk
index b035d1e..95aeaa5 100644
--- a/configs/sdm660/sdm660.mk
+++ b/configs/sdm660/sdm660.mk
@@ -262,7 +262,7 @@
 
 #enable headset calibration
 PRODUCT_PROPERTY_OVERRIDES += \
-audio.volume.headset.gain.depcal=true
+vendor.audio.volume.headset.gain.depcal=true
 
 #enable AAC frame ctl for A2DP sinks
 PRODUCT_PROPERTY_OVERRIDES += \