Refactor attach-UI service

Change-Id: Ia68ceb57ee5b5a66fa76b837fe3b990eb12e7188
diff --git a/android/protocol/ui-commands-impl.h b/android/protocol/ui-commands-impl.h
index 0e5b52f..fa05e8e 100644
--- a/android/protocol/ui-commands-impl.h
+++ b/android/protocol/ui-commands-impl.h
@@ -31,4 +31,7 @@
  */
 extern int uiCmdImpl_create(SockAddress* console_socket);
 
+/* Destroys UI-side of the "core-ui-control" service. */
+extern void uiCmdImpl_destroy();
+
 #endif /* _ANDROID_PROTOCOL_UI_COMMANDS_IMPL_H */