Use new registered_plmn carrier config.

This new config is a temporary way to override registered PLMN  name
for CDMA in home network.

Test: manual
Bug: 80145031
Merged-in: I9869437df7230b48abd9a7f690bc50bee311093a
Change-Id: I9869437df7230b48abd9a7f690bc50bee311093a
(cherry picked from commit 8d07a0df)