Bump APK version

Signed-off-by: mvglasow <michael -at- vonglasow.com>
Add preferences for event-driven AGPS data update

Signed-off-by: mvglasow <michael -at- vonglasow.com>
Gracefully handle sensors reporting zero resolution, fixes #19. Thx c-MM!

Signed-off-by: mvglasow <michael -at- vonglasow.com>