Reduce fast track multiplier for Shamu

Bug: 10546170
Change-Id: I61327de22d1102ce6f4027ccdacf116ca14260d9
diff --git a/CleanSpec.mk b/CleanSpec.mk
index c7ced08..140a686 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -63,3 +63,4 @@
 # Reduce IMS logging
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/system/build.prop)
diff --git a/device.mk b/device.mk
index 80b7622..d6a76e4 100644
--- a/device.mk
+++ b/device.mk
@@ -359,3 +359,7 @@
 # Copy the qcril.db file from qcril to system. Useful to get the radio tech family for the camped operator
 PRODUCT_COPY_FILES += \
     device/moto/shamu/qcril.db:system/etc/ril/qcril.db
+
+# Reduce client buffer size for fast audio output tracks
+PRODUCT_PROPERTY_OVERRIDES += \
+    af.fast_track_multiplier=1