GPS: Restore XTRA downloading at boot.

GPS: Restore XTRA downloading at boot.

Between Froyo and Gingerbread we disabled scheduling an XTRA data download
at boot because the Qualcomm engineers thought it should not be necessary.
However, some users noticed a GPS performance degradation after receiving
their Gingerbread update, and some reported forcing an XTRA download cleared
up the problem.  This change restores the Froyo behavior of downloading
XTRA data after boot.

Bug: 3509901

Change-Id: I5a52201a2b24ce4a5d3ddb1f86340e3d5387f603
Signed-off-by: Mike Lockwood <lockwood@android.com>