mainline: remove CarrierConfigManager.init

Bug: 147469789
Test:  make RunSettingsRoboTests ROBOTEST_FILTER=\
ApnPreferenceControllerTest (PASS)
make RunSettingsRoboTests ROBOTEST_FILTER=\
CarrierPreferenceControllerTest (PASS)
Change-Id: I2a72d409574fc281e5de57d58a27551dd040d551
3 files changed