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/DumpWriter.cpp b/server/DumpWriter.cpp
index d96d47b..9a7e352 100644
--- a/server/DumpWriter.cpp
+++ b/server/DumpWriter.cpp
@@ -23,6 +23,9 @@
 using android::String16;
 using android::Vector;
 
+namespace android {
+namespace net {
+
 namespace {
 
 const char kIndentString[] = "  ";
@@ -63,3 +66,6 @@
     va_end(ap);
     println(line);
 }
+
+}  // namespace net
+}  // namespace android