PhoneNumberValidityChangeListener not called when navigate back

When navigate to another Fragment and then go back to phone Country Code selector fragment, not working phone formatter and phoneNumberValidatorChangeListener aren't call ever.

Set both on onViewCreated method:

```
layoutMobileFields.etPhoneCountryCode.setPhoneNumberValidityChangeListener
layoutMobileFields.etPhoneCountryCode.registerCarrierNumberEditText(layoutMobileFields.etPhoneNumber as EditText)
```