netd: allow tcp connections.

DNS can use TCP connections, in addition to UDP connections.
Allow TCP connections.

Addresses the following denial:

[ 1831.586826] type=1400 audit(1384129166.563:173): avc:  denied  { create } for  pid=11406 comm="netd" scontext=u:r:netd:s0 tcontext=u:r:netd:s0 tclass=tcp_socket

Public Bug: https://code.google.com/p/android/issues/detail?id=62196
Change-Id: Ia542a9df3e466a8d409955bab6a23a524ff3d07b
Bug: 11097631

netd.te

@@ -8,9 +8,9 @@ allow netd self:netlink_kobject_uevent_socket *;
 allow netd self:netlink_route_socket *;
 allow netd self:netlink_nflog_socket *;
 allow netd self:rawip_socket *;
-allow netd self:udp_socket *;
-allow netd node:udp_socket node_bind;
-allow netd port:udp_socket name_bind;
+allow netd self:{ tcp_socket udp_socket } *;
+allow netd node:{ tcp_socket udp_socket } node_bind;
+allow netd port:{ tcp_socket udp_socket } name_bind;
 allow netd self:unix_stream_socket *;
 allow netd shell_exec:file rx_file_perms;
 allow netd system_file:file x_file_perms;