Split out ServiceList and ServiceParser from service.cpp/.h

These always should have been in their own files.

Test: build
Change-Id: I201109b5ee63016e78901bbfd404846d45e1d4e6
diff --git a/init/builtins.cpp b/init/builtins.cpp
index d9b1b85..f188ef9 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -73,6 +73,7 @@
 #include "selabel.h"
 #include "selinux.h"
 #include "service.h"
+#include "service_list.h"
 #include "subcontext.h"
 #include "util.h"