Fix typo: test -> tests in makefile tags

Change-Id: Icf23b5ae5d84f6ba9032d1707635a75352f920d2
diff --git a/media/tests/players/Android.mk b/media/tests/players/Android.mk
index eb50a51..10367cf 100644
--- a/media/tests/players/Android.mk
+++ b/media/tests/players/Android.mk
@@ -23,7 +23,7 @@
     libutils
 
 LOCAL_MODULE:= invoke_mock_media_player
-LOCAL_MODULE_TAGS := test eng
+LOCAL_MODULE_TAGS := tests eng
 LOCAL_PRELINK_MODULE:= false
 
 include $(BUILD_SHARED_LIBRARY)