Put most of netd into the android::net namespace.

Test: netd_{unit,integration}_test pass
Test: bullhead builds, boots
Bug: 34873832
Change-Id: I0a252328041b342f9c03cd08c11a69d452b045b3
diff --git a/server/main.cpp b/server/main.cpp
index 79f667c..4cc5838 100644
--- a/server/main.cpp
+++ b/server/main.cpp
@@ -50,7 +50,11 @@
 using android::IPCThreadState;
 using android::ProcessState;
 using android::defaultServiceManager;
+using android::net::CommandListener;
+using android::net::DnsProxyListener;
+using android::net::FwmarkServer;
 using android::net::NetdNativeService;
+using android::net::NetlinkManager;
 
 static void blockSigpipe();
 static void remove_pid_file();