iOS App Crashing When Loading RasterLayer

Nobody has claimed this yet.

I'm trying to show a heatmap in my Flutter app with the help of RasterSource/Layers. It was working fine in 0.5.0 but after migrating to 2.3.0 it started crashing on iOS. The error thrown in xCode is:

`Generate Mipmaps For Texture Validation [tex mipmapLevelCount](1) must be > 1`

After some investigation I found that there is an issue when the loaded tiles have a size of 1x1. This is also confirmed in one of the comments on this [StackOverflow post ](https://stackoverflow.com/questions/71487688/app-crashing-when-loading-rasterlayer-mipmaps-level-count-must-be-greater-than).

This is the code I'm using in Flutter just in case.

```
await style.addSource(
RasterSource(
id: 'overall_heatmap',
tiles: heatmap.tiles,
tileSize: 256,
scheme: Scheme.XYZ,
minzoom: heatmap.minZoom,
maxzoom: heatmap.maxZoom,
bounds: heatmap.bounds,
),
);

await style.addLayer(
RasterLayer(
id: 'heatmap',
sourceId: 'overall_heatmap',
rasterResampling: RasterResampling.LINEAR,
),
);
```

And this is my Flutter doctor result:

```
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.24.3, on macOS 14.6.1 23G93 darwin-arm64, locale en-CO)
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 15.4)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2024.1)
[✓] Connected device (4 available)
[✓] Network resources

• No issues found!
```

Thanks in advance for any help you can provide!

Start by reproducing the crash with the provided RasterSource and RasterLayer configuration on iOS, focusing on a loaded raster tile sized 1x1. Then trace the native raster texture or mipmap handling used by this Flutter integration; done means the configuration no longer crashes when such a tile is loaded and the regression is covered by an appropriate test if the repository provides one.

Written by the indexing model from the issue text.