Wrap InterfaceController into the android::net namespace

No functionality changes, this is a cleanup.

Test: m netd_unit_test
Change-Id: I5c6667051b7b4b17171e6dcc6883f17db08eaa23
diff --git a/server/InterfaceController.h b/server/InterfaceController.h
index 45ff878..4c5b27f 100644
--- a/server/InterfaceController.h
+++ b/server/InterfaceController.h
@@ -23,12 +23,10 @@
 #include <netdutils/Status.h>
 #include <netdutils/StatusOr.h>
 
-// TODO: move InterfaceController into android::net namespace.
 namespace android {
 namespace net {
+
 class StablePrivacyTest;
-}  // namespace net
-}  // namespace android
 
 class InterfaceController {
 public:
@@ -83,4 +81,7 @@
   ~InterfaceController() = delete;
 };
 
+}  // namespace net
+}  // namespace android
+
 #endif