Allow shell to connect to property service

Change-Id: I06ea2b400cc826c684b6ad25e12b021c2667b48a
diff --git a/shell.te b/shell.te
index b4fa7fd..6e5329f 100644
--- a/shell.te
+++ b/shell.te
@@ -36,7 +36,7 @@
 allow shell shell_prop:property_service set;
 
 # setprop toolbox command
-allow shell property_socket:sock_file write;
+unix_socket_connect(shell, property, init)
 
 # ctl interface
 allow shell ctl_dumpstate_prop:property_service set;