Move the 464xlat control plane from clatd to netd.

Some of this code comes from clatd and will be deleted from there
once this topic is merged.

Bug: 65674744
Test: builds, boots
Test: system/netd/tests/runtests.sh
Change-Id: Ifa30652a853401a401d0b74d259d4d27d322e758
diff --git a/server/Android.bp b/server/Android.bp
index 398ce33..b655988 100644
--- a/server/Android.bp
+++ b/server/Android.bp
@@ -72,6 +72,7 @@
     ],
     srcs: [
         "BandwidthController.cpp",
+        "ClatdController.cpp",
         "Controllers.cpp",
         "Dns64Configuration.cpp",
         "NetdConstants.cpp",
@@ -158,7 +159,6 @@
         "libnetd_resolv_headers",
     ],
     srcs: [
-        "ClatdController.cpp",
         "CommandListener.cpp",
         "DummyNetwork.cpp",
         "DumpWriter.cpp",
@@ -202,6 +202,7 @@
     ],
     srcs: [
         "BandwidthControllerTest.cpp",
+        "ClatdControllerTest.cpp",
         "ControllersTest.cpp",
         "FirewallControllerTest.cpp",
         "IdletimerControllerTest.cpp",