Clean up ScopedThreadStateChange to use ObjPtr

Also fixed inclusion of -inl.h files in .h files by adding
scoped_object_access-inl.h and scoped_fast_natvie_object_access-inl.h

Changed AddLocalReference / Decode to use ObjPtr.

Changed libartbenchmark to be debug to avoid linkage errors.

Bug: 31113334

Test: test-art-host

Change-Id: I4d2e160483a29d21e1e0e440585ed328b9811483
diff --git a/runtime/thread_list.cc b/runtime/thread_list.cc
index 17c6c2e..e2aca6a 100644
--- a/runtime/thread_list.cc
+++ b/runtime/thread_list.cc
@@ -36,7 +36,7 @@
 #include "lock_word.h"
 #include "monitor.h"
 #include "native_stack_dump.h"
-#include "scoped_thread_state_change.h"
+#include "scoped_thread_state_change-inl.h"
 #include "thread.h"
 #include "trace.h"
 #include "well_known_classes.h"