Address below corner scenarios for dual sta roaming:
1. Initialize primary interface vdev id
with WLAN_UMAC_VDEV_ID_MAX.
2. Enable roaming while processing set primary interface
vendor command irrespective of dual sta roam policy.
3. Disable mcc_adaptive_scheduler before sending
WMI_RESMGR_ADAPTIVE_OCS_ENABLE_DISABLE_CMDID to FW and
enable it if host receives dual sta policy as unbiased.
Change-Id: I8e5254c6f9053bd5fe7f925af4b577e76c9b9a2e
CRs-Fixed: 2928870