I want the fetch the list of resource types available for a patient from the FHIR server. I tried to fetch the List of items from the Patient. But it doesn't contain all the resource types available for that particular patient.
When you say "the list of resource types available for a patient from the FHIR server", I think what you mean is the resource types that can be searched by patient on the FHIR server.
To build such a list, read the FHIR server's CapabilityStatement. Iterate through the CapabilityStatement's resource array, checking each item's searchParam array for an element where name = 'patient' and type = 'reference'. If you find it, add that item's type value (i.e. the resource type) to the list.