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/Process.h b/server/Process.h
index 66c25c5..317da44 100644
--- a/server/Process.h
+++ b/server/Process.h
@@ -17,7 +17,7 @@
 #ifndef NETD_SERVER_PROCESS_H_
 #define NETD_SERVER_PROCESS_H_
 
-#include "DumpWriter.h"
+#include "netdutils/DumpWriter.h"
 
 #include <string>
 
@@ -51,7 +51,7 @@
     const std::string pidFile;
 };
 
-void dump(DumpWriter& dw);
+void dump(netdutils::DumpWriter& dw);
 
 }  // namespace process
 }  // namespace net