qcacld-3.0: Address corner scenarios for dual sta roaming

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

components/mlme/dispatcher/src/wlan_mlme_ucfg_api.c

@@ -816,6 +816,11 @@ ucfg_mlme_get_roam_bmiss_final_bcnt(struct wlan_objmgr_psoc *psoc,
 	return wlan_mlme_get_roam_bmiss_final_bcnt(psoc, val);
 }
 
+bool ucfg_mlme_get_dual_sta_roaming_enabled(struct wlan_objmgr_psoc *psoc)
+{
+	return wlan_mlme_get_dual_sta_roaming_enabled(psoc);
+}
+
 QDF_STATUS
 ucfg_mlme_get_roam_bmiss_first_bcnt(struct wlan_objmgr_psoc *psoc,
 				    uint8_t *val)