build_image.py recognize BOARD_PRODUCT_SERVICESIMAGE_PARTITION_RESERVED_SIZE

Test: builds
Bug: 79106666
Change-Id: I00c1a96c09cf7bd9274b65ac0afc47462686171d
diff --git a/core/config.mk b/core/config.mk
index 81ca30c..5ebbd9c 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -938,6 +938,13 @@
 endif
 endif
 
+ifneq ($(BOARD_PRODUCT_SERVICESIMAGE_PARTITION_SIZE),)
+ifneq ($(BOARD_PRODUCT_SERVICESIMAGE_PARTITION_RESERVED_SIZE),)
+$(error Should not define BOARD_PRODUCT_SERVICESIMAGE_PARTITION_SIZE and \
+    BOARD_PRODUCT_SERVICESIMAGE_PARTITION_RESERVED_SIZE together)
+endif
+endif
+
 endif # USE_LOGICAL_PARTITIONS
 
 # ###############################################################