config: Add the property media.stagefright.audio.deep

500ms aiff clips are taking deep buffer path
instead of low latency.

remove the property media.stagefright.audio.deep from
device/qcom/qssi and update it to false in audio HAL

Change-Id: I656fd697086f09175ff5ad8bc9f33850e754adf3
diff --git a/configs/qssi/qssi.mk b/configs/qssi/qssi.mk
index 8a8bf6b..c87b443 100644
--- a/configs/qssi/qssi.mk
+++ b/configs/qssi/qssi.mk
@@ -124,3 +124,7 @@
 PRODUCT_PROPERTY_OVERRIDES += \
 vendor.audio.enable.mirrorlink=false
 
+#enable deep buffer
+PRODUCT_PROPERTY_OVERRIDES += \
+media.stagefright.audio.deep=false
+