hal: Compilation fix for SDLLVM toolchain 16.0

Change-Id: If0c76be6857a1792ef72d077b4f8053ff1f7734d
(cherry picked from commit 7ef3684ef8eda908a0a99ea03f2ac64aaf2b9a09)
diff --git a/hal/Android.mk b/hal/Android.mk
index ee5d639..84bf143 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -368,7 +368,7 @@
 endif
 
 LOCAL_CFLAGS += -D_GNU_SOURCE
-LOCAL_CFLAGS += -Wall -Werror
+LOCAL_CFLAGS += -Wall -Werror -Wno-enum-conversion
 
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)