Implement CanReadType in InputFormatter

[ajaybhargavb]

Currently the CanReadType is missing in InputFormatter.

WebAPI Code for this:

public override bool CanReadType(Type type)
{
        if (type == null)
        {
                throw Error.ArgumentNull("type");
        }

        // If there is a registered non-null serializer, we can support this type.
        // Otherwise attempt to create the default serializer.
        object serializer = GetCachedSerializer(type, throwOnError: false);

        // Null means we tested it before and know it is not supported
        return serializer != null;
}

[ajaybhargavb]

d236d4f