Atest: add LOCAL_TEST_CONFIG to module_info.json

Bug: 112335032

Test: 1. Add LOCAL_TEST_CONFIG := ahat-tests.xml in
         art/tools/ahat/Android.mk for ahat-tests
      2. add ahat-tests.xml in local
      3. atest -m hello_world_test
      4. check module_info.json
         local_full_test_config": ["art/tools/ahat/ahat-tests.xml"]

Change-Id: Ice2a0c85979fa6b872c92aea5ff4a340342408ad
diff --git a/core/tasks/module-info.mk b/core/tasks/module-info.mk
index 38149d7..37e4831 100644
--- a/core/tasks/module-info.mk
+++ b/core/tasks/module-info.mk
@@ -14,6 +14,7 @@
 			'"compatibility_suites": [$(foreach w,$(sort $(ALL_MODULES.$(m).COMPATIBILITY_SUITES)),"$(w)", )], ' \
 			'"auto_test_config": [$(ALL_MODULES.$(m).auto_test_config)], ' \
 			'"module_name": ["$(ALL_MODULES.$(m).MODULE_NAME)"], ' \
+			'"test_config": [$(if $(ALL_MODULES.$(m).TEST_CONFIG),"$(ALL_MODULES.$(m).TEST_CONFIG)")], ' \
 			'},\n' \
 	 ) | sed -e 's/, *\]/]/g' -e 's/, *\}/ }/g' -e '$$s/,$$//' >> $@
 	$(hide) echo '}' >> $@