Change CTS makefiles so apps are built in data not system partition.

BUG 2053298

Change-Id: I2c541c03f7c33c69cde7b0567b080710658c8d28
diff --git a/tests/tests/media/Android.mk b/tests/tests/media/Android.mk
index 2c4ade1..5d8d37b 100644
--- a/tests/tests/media/Android.mk
+++ b/tests/tests/media/Android.mk
@@ -16,7 +16,10 @@
 
 include $(CLEAR_VARS)
 
+# don't include this package in any target
 LOCAL_MODULE_TAGS := optional
+# and when built explicitly put it in the data partition
+LOCAL_MODULE_PATH := $(TARGET_OUT_DATA_APPS)
 
 LOCAL_JAVA_LIBRARIES := android.test.runner