multi-carrier overlays: Add eri and config for US Cellular

Change-Id: I112716f94eb9fe7509845689688fcea13da361f7
Add Telenor Unified

New APN per https://jira.cyanogenmod.org/browse/CYAN-3338

Referenced: http://anderse.wordpress.com/2012/07/28/telenor-mobil-norway-apn-settings/

Change-Id: I119e0691128802cbfb3821ad9b17e6f49e20765e