addSource / updateGeoJSON slow performance on Android

Nobody has claimed this yet.

When loading a 1 megabyte GeoJSON source to a map style and measure the time, I see a huge performance difference between Android and iOS.

```
var dateTimeNow = DateTime.now();

await mapboxMap?.style.addSource(
GeoJsonSource(
id: "my_source",
data: jsonEncode(myGeoJSON)
)
);

print(DateTime.now().difference(dateTimeNow).inMilliseconds);
```

Android:    **1500ms** (sometimes even more)
iOS:            **130ms**

I tested on Emulators as well as physical devices, the results are the same.

The same behaviour also occurs when using _source.updateGeoJSON(...)_.

When building a native Android app, working with large GeoJSON sources in Mapbox did not result in performance issues like this.

Here you can find the full sample project:
[flutter_mapbox.zip](https://github.com/mapbox/mapbox-maps-flutter/files/15348755/flutter_mapbox.zip)

Reproduce the timing difference with the attached flutter_mapbox.zip sample, focusing on style.addSource with a 1 MB GeoJSON source and source.updateGeoJSON(...). Compare Android and iOS timings and investigate the Android path; done means large GeoJSON updates no longer show the reported Android performance gap.

Written by the indexing model from the issue text.