Refine the proto dns_resolver.proto

1. refine the enum type Transport
   The name of 1st enum value is TRANSPORT_UNKNOWN
2. remove the wrong character "CR"

Bug: 133111380
Test: ./out/host/linux-x86/bin/statsd_testdrive 116
Change-Id: I49ce1d77d8fc6a48fc8cc99cde028a3c2a4158e7
diff --git a/cmds/statsd/src/atoms.proto b/cmds/statsd/src/atoms.proto
index f04f017..6506df2 100644
--- a/cmds/statsd/src/atoms.proto
+++ b/cmds/statsd/src/atoms.proto
@@ -2818,7 +2818,7 @@
     // Only valid for event_type = EVENT_RESNSEND.
     optional int32 res_nsend_flags = 5;
 
-    optional android.stats.dnsresolver.Transport network_type = 6;
+    optional android.stats.dnsresolver.NetworkType network_type = 6;
 
     // The DNS over TLS mode on a specific netId.
     optional android.stats.dnsresolver.PrivateDnsModes private_dns_modes = 7;