Reshuffle include/ directory layout

This CL reorganizes the include/ directory as follows:
1. The immediate subdirectories of include/ are now the stable API
   surface exposed to all embedders, with the exception of ext/.
2. ext/ contains the unstable API surface that is exposed only to chrome.

Test: builds on all configurations and passes tests
Bug: 132678367
Change-Id: If638d4b4c150fd591cd1db851283b25ff6083ed6
diff --git a/src/profiling/memory/wire_protocol.cc b/src/profiling/memory/wire_protocol.cc
index 52af41b..6209fc8 100644
--- a/src/profiling/memory/wire_protocol.cc
+++ b/src/profiling/memory/wire_protocol.cc
@@ -17,8 +17,8 @@
 #include "src/profiling/memory/wire_protocol.h"
 
 #include "perfetto/base/logging.h"
-#include "perfetto/base/unix_socket.h"
-#include "perfetto/base/utils.h"
+#include "perfetto/ext/base/unix_socket.h"
+#include "perfetto/ext/base/utils.h"
 
 #include <sys/socket.h>
 #include <sys/types.h>