Merge "Add the flag for the new carrier config prefer_3g_visibility_bool" into main

  description: "Allows the framework to register for CellularIdentifierDisclosure events and emit notifications to the user about them"

  bug: "276752426"

}

flag {

  name: "hide_prefer_3g_item"

  namespace: "telephony"

  description: "Used in the Preferred Network Types menu to determine if the 3G option is displayed."

  bug: "310639009"

}