Add NS_R_INTERNAL_ERROR item into NsRcode

Bug: 119862317
Test: ./out/host/linux-x86/bin/statsd_testdrive 116

Merged-In: I023ff5dc0ae2efe45f81494929640c9b96821a0d
Merged-In: I0cf28032f8079c64253ed3f90fcf9d4705a5b492
(cherry picked from commit 83ef1697e3fdebf03c0a94fa1c41fa2ca053d669)

Change-Id: I106f73e8b0251bc7a64c68dfb450269ac7cd4feb
diff --git a/core/proto/android/stats/dnsresolver/dns_resolver.proto b/core/proto/android/stats/dnsresolver/dns_resolver.proto
index b7bf384..9eaabfb 100644
--- a/core/proto/android/stats/dnsresolver/dns_resolver.proto
+++ b/core/proto/android/stats/dnsresolver/dns_resolver.proto
@@ -67,6 +67,7 @@
     // NS_R_BADSIG  = 16,
     NS_R_BADKEY = 17;
     NS_R_BADTIME = 18;
+    NS_R_INTERNAL_ERROR = 254;
     NS_R_TIMEOUT = 255;
 }