omni: move to PRODUCT_SYSTEM_DEFAULT_PROPERTIES

Change-Id: I76c0a4a3b6c4572f1b0197c4fc39151640ef9de1
diff --git a/config/phone-xxxhdpi-3072-hwui-memory.mk b/config/phone-xxxhdpi-3072-hwui-memory.mk
index 8123fa0..fbe8df5 100644
--- a/config/phone-xxxhdpi-3072-hwui-memory.mk
+++ b/config/phone-xxxhdpi-3072-hwui-memory.mk
@@ -16,7 +16,7 @@
 
 # Provides overrides to configure the HWUI memory limits
 
-PRODUCT_PROPERTY_OVERRIDES += \
+PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
     ro.hwui.texture_cache_size=88 \
     ro.hwui.layer_cache_size=58 \
     ro.hwui.path_cache_size=32 \