Move DumpWriter to libnetdutils

resolver related component in libnetd_resolv
needs it to easily print dump log.

Bug: 122564854
Test: built, flashed, booted
      system/netd/tests/runtests.sh pass
      adb shell dumpsys netd, worked fine

Change-Id: Ic97d5f21b738fc3074e9308f4846191e744ed479
diff --git a/server/TcpSocketMonitor.cpp b/server/TcpSocketMonitor.cpp
index 5478e5d..f4b505d 100644
--- a/server/TcpSocketMonitor.cpp
+++ b/server/TcpSocketMonitor.cpp
@@ -26,9 +26,12 @@
 #include <linux/tcp.h>
 
 #include "Controllers.h"
-#include "DumpWriter.h"
 #include "SockDiag.h"
 #include "TcpSocketMonitor.h"
+#include "netdutils/DumpWriter.h"
+
+using android::netdutils::DumpWriter;
+using android::netdutils::ScopedIndent;
 
 namespace android {
 namespace net {