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/ClatdController.h b/server/ClatdController.h
index 1985836..21d4dfe 100644
--- a/server/ClatdController.h
+++ b/server/ClatdController.h
@@ -19,6 +19,9 @@
 
 #include <map>
 
+namespace android {
+namespace net {
+
 class NetworkController;
 
 class ClatdController {
@@ -36,4 +39,7 @@
     pid_t getClatdPid(char* interface);
 };
 
+}  // namespace net
+}  // namespace android
+
 #endif