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/trace_processor/trace_storage.cc b/src/trace_processor/trace_storage.cc
index 2731638..58a2d01 100644
--- a/src/trace_processor/trace_storage.cc
+++ b/src/trace_processor/trace_storage.cc
@@ -20,7 +20,7 @@
 #include <algorithm>
 #include <limits>
 
-#include "perfetto/base/no_destructor.h"
+#include "perfetto/ext/base/no_destructor.h"
 
 namespace perfetto {
 namespace trace_processor {