Add -Wno-error to compile with global -Werror.

Bug: 66996870
Test: normal builds.
Change-Id: I08c28f88148dbba859dcc5388addb82a98698dd0
diff --git a/hal/Android.mk b/hal/Android.mk
index 6574682..dc4dd1b 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -11,6 +11,7 @@
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/inc
 LOCAL_MODULE := liboffloadhal
 #LOCAL_CPP_FLAGS := -Wall -Werror
+LOCAL_CFLAGS += -Wno-error
 LOCAL_SHARED_LIBRARIES := libhwbinder \
                         libhidlbase \
                         libhidltransport \