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

Change-Id: I112716f94eb9fe7509845689688fcea13da361f7
cm: New ultimate revolutionary feature of revolution!

Change-Id: Ia3d0a099b8cb0c5170f3aaba0fb68d1f216b6be7
Merge "cm: New ultimate revolutionary feature of revolution!" into cm-11.0
Merge "multi-carrier overlays: Add eri and config for US Cellular" into cm-11.0
Merge branch 'upstream/cm-11.0'