Add module_lib and system-server artifacts to sdk dist

Makes these artifacts available for the update_prebuilts script.

Bug: 149293194
Test: m win_sdk dist && find out/dist -type f
Change-Id: Ia1064e50e987433e5e308527c6770ba2d3e8bde3
diff --git a/StubLibraries.bp b/StubLibraries.bp
index da9f165..809b809 100644
--- a/StubLibraries.bp
+++ b/StubLibraries.bp
@@ -195,6 +195,7 @@
 droidstubs {
     name: "module-lib-api",
     defaults: ["metalava-full-api-stubs-default"],
+    api_tag_name: "MODULE_LIB",
     arg_files: ["core/res/AndroidManifest.xml"],
     args: metalava_framework_docs_args + module_libs,
     check_api: {