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/RouteController.h b/server/RouteController.h
index f1affe3..75b3ca3 100644
--- a/server/RouteController.h
+++ b/server/RouteController.h
@@ -22,6 +22,9 @@
 
 #include <sys/types.h>
 
+namespace android {
+namespace net {
+
 class UidRanges;
 
 class RouteController {
@@ -89,4 +92,7 @@
                                                Permission permission) WARN_UNUSED_RESULT;
 };
 
+}  // namespace net
+}  // namespace android
+
 #endif  // NETD_SERVER_ROUTE_CONTROLLER_H