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/LocalNetwork.h b/server/LocalNetwork.h
index 89a67f4..2aa7900 100644
--- a/server/LocalNetwork.h
+++ b/server/LocalNetwork.h
@@ -19,6 +19,9 @@
 
 #include "Network.h"
 
+namespace android {
+namespace net {
+
 class LocalNetwork : public Network {
 public:
     explicit LocalNetwork(unsigned netId);
@@ -30,4 +33,7 @@
     int removeInterface(const std::string& interface) override WARN_UNUSED_RESULT;
 };
 
+}  // namespace net
+}  // namespace android
+
 #endif  // NETD_SERVER_LOCAL_NETWORK_H