Revert "libbinder: Replace deprecated utils/threads.h header"

This reverts commit bc8d5b4830d7fb5afe52f9d8809212babedd72b1.

Reason for revert: breaks libvrflinger build

Change-Id: I767dbf3ed56893ead497184d2204a04156faaa9d
diff --git a/libs/binder/ProcessState.cpp b/libs/binder/ProcessState.cpp
index 27d1165..1821729 100644
--- a/libs/binder/ProcessState.cpp
+++ b/libs/binder/ProcessState.cpp
@@ -24,10 +24,9 @@
 #include <binder/IServiceManager.h>
 #include <binder/Stability.h>
 #include <cutils/atomic.h>
-#include <utils/AndroidThreads.h>
 #include <utils/Log.h>
 #include <utils/String8.h>
-#include <utils/Thread.h>
+#include <utils/threads.h>
 
 #include "Static.h"
 #include "binder_module.h"