* [android] Include more generated sanity tests for Android test app.
* [android] Add null check for camera position padding.
* [android] Skip map load tests if no mapView is found, include more generated sanity tests for Android test app.
* [android] Set mapboxMap to null during the mapView destroy process, fix failed sanity tests.
* [android] Add file source related activities to the sanity test exclude list.
* [android] Fixes according to @tobrun's review.
* [android] Add more activities to exclude list, keep MapSnapshotterActivity for regression test.