Migrate SPN Overrides to Carrier Config

This change migrates everything from the latest
aosp version of spn-conf.xml to Carrier Config.
This will permit the simplification of SPN
overriding logic.

Bug: 68049890
Test: compilation + boot
Change-Id: Icf12b5a7e675e3f99a4d017418c84b3d0d414a21
82 files changed