Change the IP addresses used by CLAT.

- Change the IPv4 address to 192.0.0.4. This is one of the IPv4
  addresses reserved by IANA for DS-Lite, so it's close enough.
- Change the IPv6 IID to ::464. The current code uses an IID
  in the IANA reserved range.

Change-Id: I6039f13efc7d20c433b03cd322fc82a3a45b84cf

clatd.conf

@@ -1,9 +1,9 @@
 # host ID to use as the source of CLAT traffic
 # this is a /128 taken out of the /64 routed to the phone
-ipv6_host_id ::200:5E10:0:0
+ipv6_host_id ::464
 
 # ipv4 subnet for the local traffic to use.  This is a /32 host address
-ipv4_local_subnet 192.168.255.1
+ipv4_local_subnet 192.0.0.4
 
 # get the plat_subnet from dns lookups (requires DNS64)
 plat_from_dns64 yes