Use -Werror in hardware/interfaces/automotive/evs/1.0

Bug: 66996870
Test: build with WITH_TIDY=1
Change-Id: Id72582780b806b27ed126a92ee6af55ca6ac4237
Merged-In: I8b8490b3e828a9a31af8f6f823d9c70e1c11c9c5
diff --git a/automotive/evs/1.0/default/Android.mk b/automotive/evs/1.0/default/Android.mk
index 0ee7071..28abe6c 100644
--- a/automotive/evs/1.0/default/Android.mk
+++ b/automotive/evs/1.0/default/Android.mk
@@ -24,6 +24,6 @@
     liblog \
     libutils \
 
-LOCAL_CFLAGS := -O0 -g
+LOCAL_CFLAGS := -O0 -g -Wall -Werror
 
 include $(BUILD_EXECUTABLE)