Setting BackgroundColor of AnimalTemplate, disables the backgroundColor style of the grid element

**Repo**: https://github.com/dotnet/maui-samples/tree/main/8.0/Fundamentals/Shell

When I set the `Background|BackgroundColor` property for DataTemplate "AnimalTemplate":
**App.xaml:**

```

<Setter Property="VisualStateManager.VisualStateGroups">
<VisualStateGroupList>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Property="BackgroundColor"
Value="Green" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateGroupList>
</Setter>


```

`AnimalTemplate` is the `ItemTemplate` for the `CollectionView`.

**Result:**
Items' BackgroundColor doesn't change.

**Expected Result:**
Selected items'backgroundColor changes to green background.

---

**Repro:**
1. Add Background="Pink" to DataTemplate x:Key="AnimalTemplate" in `App.xaml`
2. Run the app
3. Select a cat
4. Navigate back to CatsPage.xaml

The previously selected cat is in selected state, but backgroundColor didn't change.