Use -Werror in frameworks/native/services/sensorservice

Bug: 66996870
Test: build with WITH_TIDY=1
Change-Id: I4a952b80af04f68e64b30a00c2c6cc43336d3f44
diff --git a/services/sensorservice/tests/Android.mk b/services/sensorservice/tests/Android.mk
index e894655..8a9c36b 100644
--- a/services/sensorservice/tests/Android.mk
+++ b/services/sensorservice/tests/Android.mk
@@ -4,6 +4,8 @@
 LOCAL_SRC_FILES:= \
 	sensorservicetest.cpp
 
+LOCAL_CFLAGS := -Wall -Werror
+
 LOCAL_SHARED_LIBRARIES := \
 	libutils libsensor libandroid