Prima: Sanity checks for session_id in CSR

For session_id is not have sanity check, an OOB would happen
leads to crash.

Added Sanity checks for session_id in roam functions and
return failure if session_id is equals to NULL or MAX value.

Change-Id: I5ad824bd4300abdc469edf97313f6f8da4d155de
CRs-Fixed: 3173642