NarrowPublicClassMethodParamTypeRule: Take default value into account

[staabm]

even if all calling types provide the same value, when a default value of a different type is used, the rule should not suggest to change the type.

in our case the default value is intentionally not a int, as we could otherwise not differentiate it from external calls.

[staabm]

found a fix

[TomasVotruba]

Thank you 👏