Enable ABI checker on DNS resolver

Bug: 144407448
Test: 1. m com.android.resolv, build pass
      2. modify resolv_gethostbyaddr_from_cache() in resolv.h
      3. m com.android.resolv, build error because of ABI checker

Change-Id: I5d85e01be62e9acf2e2a2617b8ecb791f4ed5e2f
diff --git a/Android.bp b/Android.bp
index 735902b..a228e9b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -113,6 +113,10 @@
             ],
         },
     },
+    header_abi_checker: {
+        enabled: true,
+        symbol_file: "libnetd_resolv.map.txt",
+    },
 }
 
 cc_library_static {