Class android.telephony.`CarrierConfigManager`

Added Fields
`String` `KEY_ALLOW_ADD_CALL_DURING_VIDEO_CALL_BOOL`
`String` `KEY_ALLOW_MERGE_WIFI_CALLS_WHEN_VOWIFI_OFF_BOOL`
`String` `KEY_DROP_VIDEO_CALL_WHEN_ANSWERING_AUDIO_CALL_BOOL`
`String` `KEY_TREAT_DOWNGRADED_VIDEO_CALLS_AS_VIDEO_CALLS_BOOL`

Class android.telephony.CarrierConfigManager