Calculate code complexity for PhoneNumberUtil::maybeStripNationalPrefixAndCarrierCode

[newinteger]

lizard gives a CCN of 16

[newinteger]

I counted it to 16

1. Lizard gave the same result
2. The code is around 50 lines of code, so it is not very long
3. The purpose of the function is to strip the national prefix and carrier code from a function depending on some conditions
4. The function does not have any exceptions
5. The function is well documented

[ekner]

I counted CCN to 17

[spelgubbe]

I counted it to 16.