policy_hal: enable integer overflow sanitizer

Enable integer overflow sanitizer for kona.

Change-Id: I9908c6f107706cf1c57a96f594c5871a1b5ccebc
diff --git a/policy_hal/Android.mk b/policy_hal/Android.mk
index 689838e..2c6fece 100644
--- a/policy_hal/Android.mk
+++ b/policy_hal/Android.mk
@@ -75,6 +75,9 @@
 
 LOCAL_MODULE := libaudiopolicymanager
 
+ifeq ($(call is-board-platform-in-list,kona),true)
+LOCAL_SANITIZE := integer_overflow
+endif
 include $(BUILD_SHARED_LIBRARY)
 
 endif