Populate user assignements into PractitionerDetails contained field

[Rkareko]

The current implementation stores the user assignment resources in the FhirPractitionerDetails class.
During parsing of the bundle on the android app the HAPI FHIR JsonParser only populates 1 item for each of the fields in the FhirPractitionerDetails even though the payload from the server contains multiple values. This issue is documented here

The HAPI FHIR JsonParser parses all resource entries in the contained field correctly.
As such, the fix is to populate the PractitionerDetails.contained field with the user assigned resources such as locations, teams, groups e.t.c