Remove TelephonyManagerConstants

- Must migrated to TelephonyManager directly
- Except NETWORK_MODE_UNKNOWN not in TelephonyManager, moved to
  newly created NetworkModes
- Move addNrToLteNetworkMode() and reduceNrToLteNetworkMode() to
  NetworkModes and adding tests

Bug: 373771849
Flag: EXEMPT refactor
Test: manual - on sims settings
Test: unit tests
Change-Id: I0781a59905415aa7896510ad086d19da48e8ba37