Range Check CarrierDisplayNameData Constructor

In order to prevent a future regression, add a
simple range check to the constructor of the
CarrierDisplayNameData class. This will ensure
that if there is an SPN set, then there must also
be a Data SPN set.

Bug: 358669494
Test: atest CarrierDisplayNameResolverTest\
      #testCarrierDisplayNameData_enforceNonNullDataSpn
Flag: EXEMPT bugfix
Change-Id: I08c89b75c8242699051e99604479ffdf2a2eb7e2