Move frameworks/base/tools/ off AndroidConfig.h.

Change-Id: Ibc7abb67a56945a9618bc91ccdbebe4c806879a5
diff --git a/tools/aidl/aidl.cpp b/tools/aidl/aidl.cpp
index ff08b67..368e73d 100644
--- a/tools/aidl/aidl.cpp
+++ b/tools/aidl/aidl.cpp
@@ -1,6 +1,7 @@
 
 #include "aidl_language.h"
 #include "options.h"
+#include "os.h"
 #include "search_path.h"
 #include "Type.h"
 #include "generate_java.h"