Location Unit tests

- Added the GnssStatus unit test
- Upgraded the runner to AndroidJunitRunner
- Removed the old non-working unit tests.

To run the tests, use any of this:
1. runtest frameworks-location
2. forrest test FrameworksLocationTests

Bug: 69375757
Test: runtest frameworks-location

Change-Id: Ia52a8ce51ab9334ad1b8dd1686303270ceca270b