Add MDNS service

Adds both the new service and another socket for netd.

Change-Id: Ie0271a2c48aa55217ae3fcdcc8e121b86b5a589b
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 71ec3fa..a0e4d19 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -398,6 +398,7 @@
     class main
     socket netd stream 0660 root system
     socket dnsproxyd stream 0660 root inet
+    socket mdns stream 0660 root system
 
 service debuggerd /system/bin/debuggerd
     class main
@@ -495,3 +496,12 @@
 service sshd /system/bin/start-ssh
     class main
     disabled
+
+service mdnsd /system/bin/mdnsd
+    class main
+    user mdnsr
+    group inet net_raw
+    socket mdnsd stream 0660 mdnsr inet
+    disabled
+    oneshot
+