Calling "getPackageSplit" & "calcPackageWeight" methods from outside of the class causes compilation error, as their access modifiers are private.
So fixing this bug, following points are covered in this commit.
1) Moving "getPackageSplit" and "calcPackageWeight" from UspsServices.java to ShipmentWorker.java. They are not Usps third party related methods.
2) Changing access modifiers of these methods to public.