axolotl: gps: Adding Xtra Version Check

Tells Qualcomm GPS hardware to check that the
XTRA file version downloaded matches the version
expected - i.e. the more secure (signed) version 3

Test: On device, tested on nyc-mr1 same change, watched
Xtra download logs and confirmed GPS acted as if Xtra
assisted

Bug: 31470303
Change-Id: I959327e969c31157a35d622d49e2f7b7067bb0d7