Move android.security test service to stub package

This actually broke other tests. Move the service to the stub package so
we can change targetPackage back to the stub.

Bug: 10569131
Change-Id: I83f7e85548ab388aa9b708ff20fd392d62cc0286
diff --git a/tests/Android.mk b/tests/Android.mk
index 15705dd..4a87b07 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -20,7 +20,8 @@
 LOCAL_SRC_FILES := $(call all-java-files-under, src)\
               $(call all-renderscript-files-under, src)\
               src/android/app/cts/ISecondary.aidl\
-              src/android/os/cts/IEmptyService.aidl
+              src/android/os/cts/IEmptyService.aidl\
+              src/android/security/cts/activity/ISecureRandomService.aidl
 
 LOCAL_JAVA_LIBRARIES := android.test.runner