Read from CarrierConfigManager instead of config.xml

This updates GsmUmtsOptions and CdmaOptions to read from the new
CarrierConfigManager API. These variables have been migrated:

config_carrier_settings_enable
config_operator_selection_expand
config_show_apn_setting_cdma

We don't register for ACTION_CARRIER_CONFIG_CHANGED broadcasts because
this variable is read when the settings activity is created, and the
value of the variable should only change when the sim operator changes.
(i.e. swapping SIM while viewing this activity)

Bug: 20270007
Change-Id: I73c22af620942324be32b04209ea47fd14495675
2 files changed