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/FwmarkServer.cpp b/server/FwmarkServer.cpp
index 38a116d..a9a18c5 100644
--- a/server/FwmarkServer.cpp
+++ b/server/FwmarkServer.cpp
@@ -30,6 +30,9 @@
 using android::String16;
 using android::net::metrics::INetdEventListener;
 
+namespace android {
+namespace net {
+
 FwmarkServer::FwmarkServer(NetworkController* networkController, EventReporter* eventReporter) :
         SocketListener("fwmarkd", true), mNetworkController(networkController),
         mEventReporter(eventReporter) {
@@ -252,3 +255,6 @@
 
     return 0;
 }
+
+}  // namespace net
+}  // namespace android