RatingControl Lightweight Styling not working for RatingControlSelectedForeground

[kazo0]

Discussion: unoplatform/uno#15394

Given the following XAML:

<Grid VerticalAlignment="Center">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <RatingControl VerticalAlignment="Center"
                    HorizontalAlignment="Center"
                    Value="3">
        <RatingControl.Resources>
            <SolidColorBrush x:Key="RatingControlSelectedForeground"
                                Color="Red" />
            <SolidColorBrush x:Key="RatingControlUnselectedForeground"
                                Color="Orange" />
        </RatingControl.Resources>
    </RatingControl>
    <Border Grid.Row="1">
        <Border.Resources>
            <MaterialTheme xmlns="using:Uno.Material" />
        </Border.Resources>
        <RatingControl VerticalAlignment="Center"
                        HorizontalAlignment="Center"
                        Value="3">
            <RatingControl.Resources>
                <SolidColorBrush x:Key="RatingControlSelectedForeground"
                                    Color="Red" />
                <SolidColorBrush x:Key="RatingControlUnselectedForeground"
                                    Color="Orange" />
            </RatingControl.Resources>
        </RatingControl>
    </Border>
</Grid>

Current behavior

Expected behavior

Sample app

ratingcontrolapp.zip