"module_current" and "system_server_current" should contain ART's @SystemApi(MODULE_LIBRARIES)

Before this fix, compiling a java_library against sdk_version:
"module_current" can't use the @SystemApi(MODULE_LIBRARIES) provided
by the ART module because the system module "core-current-stubs-system-modules"
contains only the public APIs.

Use the new system module with module lib APIs.

(cherry picked from commit b54f5aa3599196cfed8c32d3e52e1c35b51b8473)

Bug: 183097033
Test: m droid
Merged-In: I274e2710d1ff34e896aa620bfafb4481180c53b5
Change-Id: I374bc4899ef8f60344e37a94ad3cb8492f47fb4d
diff --git a/java/testing.go b/java/testing.go
index 7b452f7..3ef51bd 100644
--- a/java/testing.go
+++ b/java/testing.go
@@ -312,6 +312,7 @@
 
 	systemModules := []string{
 		"core-current-stubs-system-modules",
+		"core-module-lib-stubs-system-modules",
 		"legacy-core-platform-api-stubs-system-modules",
 		"stable-core-platform-api-stubs-system-modules",
 	}