Revert "Revert "Add US Cellular Overlays""

This reverts commit 58282abbc668347b37b1db0a4a3b1c8e4757f764.
overlay: use DEVICE_PACKAGE_OVERLAYS

This is the old behavior. It was included in a commit
that overrode vendor/cm which we don't need to do anymore.

Change-Id: I64ebb5b9e60124359f875c291429839d7c8d7282