Extend carrier configs for visual voicemail

This CL make the hidden config values in N MR1 public.

Test: constant changes
Bug: 34132192
Change-Id: Iff3f98a01ccd59edd809e5c7de0cdb445dee4d35
Merged-in: Iff3f98a01ccd59edd809e5c7de0cdb445dee4d35
4 files changed