GPS: Fixed a bug in the flag value used for XTRA download in

GpsLocationProvider

A bug in GpsLocationProvider wherein the wrong flag value is used to
check if the download needs to be carried out or not is fixed. This
results in XTRA data download succeeding in the second and subsequent
sessions also.

CRs-Fixed: 246468
Change-Id: I3350559c091dece068124ffc5a6656c1157c7d56