Run core unit test during Android CI jobs

[LukasPaczos]

Follow up from mapbox/mapbox-gl-native#13617. @alexshalamov mentioned that there are some flaky tests and capturing from the chat we should determine and ignore them for now. When the CI job is set up and stable, we can gradually fix them up.

[tobrun]

We currently run these tests as part of mobile-metrics, any need of moving them to gl-native instead?

[LukasPaczos]

I think we should in order to catch regressions and bugs early.

[tobrun]

Let's move forward on this, this will be a great way to assure QA with decoupling the repositories.

[stale]

This issue has been automatically detected as stale because it has not had recent activity and will be archived. Thank you for your contributions.