Ability to recognize country when inserting a phone number

[lukas-pierce]

When code user provides autofillHints telephoneNumber iOS automatically suggests end user's phone from their contact card (Phone -> Contacts -> My Card)

TextFormField(
  autofillHints: const [
    AutofillHints.telephoneNumber,
  ],
  inputFormatters: [
    LibPhonenumberTextFormatter(
      country: libphonenumber.CountryManager().countries.firstWhere((c) => c.countryCode == 'AE')
    ),
  ],
  ...
)

In this case, the LibPhonenumberTextFormatter treats the prefix as part of the number and removes the ending. But it would be great if, when inserting, the country was automatically recognized and the appropriate mask was applied. You can see an example in this GIF

For these purposes I added dlibphonenumber package dependency. Which is a dart port of the google/libphonenumber original library

[acoutts]

hey can you please update this to the latest main so i can review it again?