Indeed, in Contacts there are lots of fields that have different names in the spec and the Android's native API, these are mappings for them.

I isolated all these into this `ContactConstants` class to get rid of tons of `if/else`, otherwise you will see the code is full with this and that names which makes the main logic is very hard to find out.

This is the clearest way of initialization I know, especially after we don't have the 80 chars limits. If someone can propose better one that will be great.