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
apns-conf.xml: update verizon apns

* these are taken from the latest jfltevzw ota update
* appears bearer is no longer needed
* general cleanup of duplicates

Change-Id: Ida43d7e1419d58a50d16c02d51d2bc4ed3495aa6