GPS Test

Invalid date

1.6
Support firebase crashlytics SDK

1.5
Improve CPU resource consuming

1.4
Fix app crash bug

1.3
Show message to notify user when GPS start, stop and almanac deleted.
Add different speed unit in settings.
GPS stopped if user click home button.
Some performance improvement.

1.2
Fix app crash bug when deleting almanac data

1.1
GPS test function