Refactor signal strength in SIM status

- Move data logic into repository for better testing
- Check carrier config first, if not shows some items, we don't need to
  load data
- Tests in SimStatusDialogControllerTest will be fixed in later cls

Bug: 337417520
Test: manual - on SIM status
Test: unit test
Change-Id: Iccd209fd455d66d4f6438652ee7481d2a0e72a99