Add aconfig rules

Test: treehugger
Change-Id: I456f87894926287a91d42e738016ca8052cd5039
diff --git a/core/soong_config.mk b/core/soong_config.mk
index 034d044..8b9ba4f 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -319,6 +319,9 @@
 $(call add_json_str,  ProductBrand,        $(PRODUCT_BRAND))
 $(call add_json_list, BuildVersionTags,    $(BUILD_VERSION_TAGS))
 
+$(call add_json_str, ReleaseVersion,    $(_RELEASE_VERSION))
+$(call add_json_list, ReleaseDeviceConfigValueSets,    $(RELEASE_DEVICE_CONFIG_VALUE_SETS))
+
 $(call json_end)
 
 $(file >$(SOONG_VARIABLES).tmp,$(json_contents))