Proper API hierarchy between MODULE_LIBS and PRIV_APPS system APIs

Test: build / treehugger
Bug: 146727827
Exempt-From-Owner-Approval: Cherry-picking from goog/master to aosp/master
Merged-in: Ie1ad6711c490c679ebcfacd97154380a8810ba1c
Change-Id: Ie1ad6711c490c679ebcfacd97154380a8810ba1c
diff --git a/apex/Android.bp b/apex/Android.bp
index 380b4c6..f34ecbd 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -53,6 +53,9 @@
 module_libs = " " +
     " --show-annotation android.annotation.SystemApi\\(" +
         "client=android.annotation.SystemApi.Client.MODULE_LIBRARIES" +
+    "\\)" +
+    " --show-for-stub-purposes-annotation android.annotation.SystemApi\\(" +
+        "client=android.annotation.SystemApi.Client.PRIVILEGED_APPS" +
     "\\) "
 
 mainline_service_stubs_args =