netd.te: allow ctl.mdnsd

Allow netd to set ctl.* properties. Currently, mdnsd is broken because
it can't set this property.

Bug: 9777774
Change-Id: I2f32504d77b651e66e0a0067e65a5ed44b427f5a

netd.te

@@ -48,3 +48,7 @@ allow netd hostapd:process signal;
 domain_auto_trans(netd, dnsmasq_exec, dnsmasq)
 allow netd dnsmasq:process signal;
 
+# Support netd running mdnsd
+# TODO: prune this back further
+allow netd ctl_default_prop:property_service set;
+allow netd device:sock_file write;