CameraOptions padding does not work

[noforeignland]

The padding property of CameraBounds is ignored when calculating coordinate bounds.

This makes it impossible to detect which areas of the map are clear of obstructions like floating buttons and toolbars.

To reproduce:

    CameraState c = await mapboxMap.getCameraState();

    // get a bounds with padding
    var borderPixels = 20.0;
    final b1 = await mapboxMap.coordinateBoundsForCamera(CameraOptions(
      padding: MbxEdgeInsets(
        top: borderPixels,
        left: borderPixels,
        bottom: borderPixels,
        right: borderPixels,
      ),
      center: c.center,
      zoom: c.zoom,
      pitch: c.pitch,
    ));

    // get a bounds without padding
    final b2 = await mapboxMap.coordinateBoundsForCamera(CameraOptions(
      center: c.center,
      zoom: c.zoom,
      pitch: c.pitch,
    ));

    // the coordinates should be different but are the same
    bool neSame = b1.northeast.coordinates == b2.northeast.coordinates;
    bool swSame = b1.southwest.coordinates == b2.southwest.coordinates;

    print('neSame: $neSame'); // prints true
    print('swSame: $swSame'); // prints true

Expected behaviour:

The padding should be applied to the bounds returned.