Composite activity doesn't call activities providers when using InputActivityObject

[stuartmcgillivray]

When building a composite activity with an activity that includes a property marked with ActivityInputObjectAttribute, propertyProviders aren't checked for that property so the Set method is never called.

In this example setting up the InternalActivity, it will run the Set() method on the Test property but not on TestAgain property.

  public class TestCompositeActivity : CompositeActivity
    {
        [ActivityInputObject]
        public Test Test
        {
            get => GetState<Test>();
            set => SetState(value);

        }

        public override void Build(ICompositeActivityBuilder builder)
        {
            builder
                .Then<InternalActivity>(setup =>
                {
                    setup.Set(c => c.Test, () =>
                    {
                        return Test;
                    });
                    setup.Set(c => c.TestAgain, () =>
                    {
                        return Test;
                    });

                });
        }

    }

    public class InternalActivity : Activity
    {
        [ActivityInput]
        public Test Test { get; set; }

        [ActivityInputObject]
        public Test TestAgain { get; set; }
        protected override async ValueTask<IActivityExecutionResult> OnExecuteAsync(ActivityExecutionContext context)
        {
            return Done();
        }
    }

This update will check if there is a provider for a nested property marked with ActivityInputObjectAttribute before trying to iterate though all its'properties.