Revert "Revert "Export variable to soong for converting vintf_co..."

Revert submission 3235656-revert-3195743-compatibility_matrix-KLJOLWYIMW

Reason for revert: The root cause of the break is already be merged. Related changes: ag/29139095, ag/29139608

Reverted changes: /q/submissionid:3235656-revert-3195743-compatibility_matrix-KLJOLWYIMW

Change-Id: I40d9e6c03dd092783e86338a334851a36f5488dd
diff --git a/core/soong_config.mk b/core/soong_config.mk
index 09ee938..874cbc3 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -353,6 +353,11 @@
 $(call add_json_str, EnableUffdGc, $(_config_enable_uffd_gc))
 _config_enable_uffd_gc :=
 
+$(call add_json_list, DeviceFrameworkCompatibilityMatrixFile, $(DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE))
+$(call add_json_list, DeviceProductCompatibilityMatrixFile, $(DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE))
+$(call add_json_list, BoardAvbSystemAddHashtreeFooterArgs, $(BOARD_AVB_SYSTEM_ADD_HASHTREE_FOOTER_ARGS))
+$(call add_json_bool, BoardAvbEnable, $(filter true,$(BOARD_AVB_ENABLE)))
+
 $(call json_end)
 
 $(file >$(SOONG_VARIABLES).tmp,$(json_contents))