PBAP: Apply listStartOffset in the final list

This change will apply the offet value in the final list of
vcard values prepared after comparing with the search value
as per the specification. ListStartOffset was being applied on the
original list of names earlier returning extra set of values of names
while Vcardlisting.

Change-Id: I14182a06cce6f4e945371ca515e6fad2cea2508b
CRs-Fixed: 725842