Create Service and ServiceManager classes

Change-Id: I363a5e4751ad83d2f4096882a6fbbeddca03acfe
diff --git a/init/Android.mk b/init/Android.mk
index 045e213..6737be4 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -48,6 +48,7 @@
     init_parser.cpp \
     log.cpp \
     parser.cpp \
+    service.cpp \
     util.cpp \
 
 LOCAL_STATIC_LIBRARIES := libbase