arc: Move platform2/arc/network/ to platform2/patchpanel

Next step in the arc-networkd -> patchpanel rename, this patch moves the
location of the code.

BUG=b:151879931
TEST=units,flashed image to atlas
TEST=tasts arc.PlayStore, crostini.LaunchTerminal.download

Change-Id: I1b5cf8d670e1631d46f6449b725395157bf88dde
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2115863
Tested-by: Garrick Evans <garrick@chromium.org>
Commit-Queue: Garrick Evans <garrick@chromium.org>
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Hugo Benichi <hugobenichi@google.com>
diff --git a/system-proxy/curl_socket.cc b/system-proxy/curl_socket.cc
index 5144743..32673f9 100644
--- a/system-proxy/curl_socket.cc
+++ b/system-proxy/curl_socket.cc
@@ -10,7 +10,7 @@
 namespace system_proxy {
 
 CurlSocket::CurlSocket(base::ScopedFD fd, ScopedCurlEasyhandle curl_easyhandle)
-    : arc_networkd::Socket(std::move(fd)),
+    : patchpanel::Socket(std::move(fd)),
       curl_easyhandle_(std::move(curl_easyhandle)) {}
 
 CurlSocket::~CurlSocket() {