Add dumpsys support to ResolverController

BUG: 25731675

Change-Id: I1c715368b1f2d5e732528cd226b3f69792b75321
diff --git a/server/NetworkController.cpp b/server/NetworkController.cpp
index 7c2a826..8b1f84e 100644
--- a/server/NetworkController.cpp
+++ b/server/NetworkController.cpp
@@ -38,6 +38,7 @@
 #include "cutils/misc.h"
 #include "resolv_netid.h"
 
+#include "Controllers.h"
 #include "DummyNetwork.h"
 #include "DumpWriter.h"
 #include "Fwmark.h"
@@ -525,6 +526,8 @@
     dw.incIndent();
     for (const auto& i : mNetworks) {
         dw.println(i.second->toString().c_str());
+        android::net::gCtls->resolverCtrl.dump(dw, i.first);
+        dw.blankline();
     }
     dw.decIndent();