Change aapt flag to use new name

Change-Id: I59ee77ede4716fdbf8403504da65fcadc9946423
diff --git a/core/definitions.mk b/core/definitions.mk
index 8f8aa4d..c0bfd9b 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1704,7 +1704,7 @@
 define add-assets-to-package
 $(hide) $(AAPT) package -u $(PRIVATE_AAPT_FLAGS) \
     $(addprefix -c , $(PRIVATE_PRODUCT_AAPT_CONFIG)) \
-    $(addprefix --preferred-configurations , $(PRIVATE_PRODUCT_AAPT_PREF_CONFIG)) \
+    $(addprefix --preferred-density , $(PRIVATE_PRODUCT_AAPT_PREF_CONFIG)) \
     $(addprefix -M , $(PRIVATE_ANDROID_MANIFEST)) \
     $(addprefix -S , $(PRIVATE_RESOURCE_DIR)) \
     $(addprefix -A , $(PRIVATE_ASSET_DIR)) \