Move heapprofd into perfetto::profiling namespace.

Change-Id: Ic6310fc8f80f9d645c55e6bf13395f0e0bb79bf3
diff --git a/src/profiling/memory/client.h b/src/profiling/memory/client.h
index a4791f8..c9cb8b0 100644
--- a/src/profiling/memory/client.h
+++ b/src/profiling/memory/client.h
@@ -27,6 +27,7 @@
 #include "src/profiling/memory/wire_protocol.h"
 
 namespace perfetto {
+namespace profiling {
 
 class BorrowedSocket;
 
@@ -153,6 +154,7 @@
   std::atomic<uint64_t> sequence_number_{0};
 };
 
+}  // namespace profiling
 }  // namespace perfetto
 
 #endif  // SRC_PROFILING_MEMORY_CLIENT_H_