Move ActionManager to its own file

Bug: 36970783
Test: build
Change-Id: I08fa39052236b462249f79de1d02bf02bdbf4c84
diff --git a/init/builtins.cpp b/init/builtins.cpp
index be259c2..5d924b1 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -58,7 +58,7 @@
 #include <selinux/selinux.h>
 #include <system/thread_defs.h>
 
-#include "action.h"
+#include "action_manager.h"
 #include "bootchart.h"
 #include "init.h"
 #include "parser.h"