Build CTS out of TF source

Test: make cts dist, run unit tests
Bug: 32819381
Change-Id: I202c2a35e3745a372df8bec4903162d933ae04fb
diff --git a/hostsidetests/services/activityandwindowmanager/activitymanager/Android.mk b/hostsidetests/services/activityandwindowmanager/activitymanager/Android.mk
index 703895a..ff9e62b 100644
--- a/hostsidetests/services/activityandwindowmanager/activitymanager/Android.mk
+++ b/hostsidetests/services/activityandwindowmanager/activitymanager/Android.mk
@@ -23,7 +23,7 @@
 
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
-LOCAL_JAVA_LIBRARIES := cts-tradefed tradefed-prebuilt
+LOCAL_JAVA_LIBRARIES := cts-tradefed tradefed
 LOCAL_STATIC_JAVA_LIBRARIES := cts-amwm-util
 
 LOCAL_CTS_TEST_PACKAGE := android.server