Remove PackageReference Xamarin.Google.Android.Material
## 🏗 Enhancement Proposal

I noticed NETSDK1023 'Xamarin.Google.Android.Material' warning during build process of my app.
Seems like Xamarin.Google.Android.Material is provided by workload and can be removed from PackageReference.

/usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/33.0.68/targets/Microsoft.Android.Sdk.targets contains next reference, which seems to have Xamarin.Google.Android.Material reference
`  
<ItemGroup Condition=" '$(DisableImplicitFrameworkReferences)' != 'true' ">
    <FrameworkReference
        Include="Microsoft.Android"
        IsImplicitlyDefined="true"
        Pack="false"
        PrivateAssets="All"
    />
  </ItemGroup>
`

### Pitch

Consumers of MvvmCross will have an option to remove PackageReference of Xamarin.Google.Android.Material from their applications. As for now, if user removes the PackageReference, there can be a "Detected package downgrade" error, if there is a mismatch between workload version used by MvvmCross and application.

### Platforms affected (mark all that apply)
- [ ] :iphone: iOS
- [x] :robot: Android
- [ ] :checkered_flag: WPF
- [ ] :earth_americas: UWP
- [ ] :apple: MacOS
- [ ] :tv: tvOS
- [x] :monkey: Xamarin.Forms
