Add BoardPlatVendorPolicy to soong config

Bug: 205924657
Test: build
Change-Id: I89697a82c6d288576ae066f82a067383ccd57e2e
diff --git a/core/soong_config.mk b/core/soong_config.mk
index a48b4d8..617abdf 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -189,6 +189,7 @@
 
 $(call add_json_list, PgoAdditionalProfileDirs,          $(PGO_ADDITIONAL_PROFILE_DIRS))
 
+$(call add_json_list, BoardPlatVendorPolicy,             $(BOARD_PLAT_VENDOR_POLICY))
 $(call add_json_list, BoardReqdMaskPolicy,               $(BOARD_REQD_MASK_POLICY))
 $(call add_json_list, BoardVendorSepolicyDirs,           $(BOARD_VENDOR_SEPOLICY_DIRS) $(BOARD_SEPOLICY_DIRS))
 $(call add_json_list, BoardOdmSepolicyDirs,              $(BOARD_ODM_SEPOLICY_DIRS))