Added APN for Tal Iceland, ref CYAN-5026.
Note that I am not on that network myself so I have not been able to verify the settings. However, they are taken from the official support site.

Change-Id: I8b803f5af6e6c307f4ce85f1e20bf75050bcf1be
(cherry picked from commit b907f464a9400be3884258d5f4814da90b3507aa)