Shipping Method Pickup is missing in the Backend

[amenk]

I can't activate the PickUp method in the backend.

I think it is missing in

https://github.com/magento/magento2/blob/develop/app/code/Magento/OfflineShipping/etc/adminhtml/system.xml

[tanya-soroka]

@amenk thanks for the contribution of the new shipping method for the Magento2. I assignee this implementation to Ilya.