Move android.app Activities into com.android.cts.app.stub

bug: 17614217
Change-Id: Ie893389c4f00c66313fc26447b0f569250c64c3f
diff --git a/CtsTestCaseList.mk b/CtsTestCaseList.mk
index a3ca867..c9cdb15 100644
--- a/CtsTestCaseList.mk
+++ b/CtsTestCaseList.mk
@@ -31,6 +31,7 @@
 
 cts_support_packages := \
     CtsAccelerationTestStubs \
+    CtsAppTestStubs \
     CtsDeviceAdmin \
     CtsDeviceOpenGl \
     CtsDeviceTaskswitchingAppA \