Example number functionality

[derkicker]

Hi! Thx for the good work and a small request. Lib currently has methods to get example number for country but original google resources only store 1 example. Looks like it's always the shortest one of all possible variants. Say we have this block working on:

For the masking purposes i'd like to have example number of max possible length but currently lib doesn't provide any public methods to get that info. PhoneNumber can store a reference to PhoneNumberDesc for example.