RDKB-20826 : CcspWifiSsp crash CosaDmlWiFi_GetRapidReconnectIndicationEnable
RDKB-20826 : CcspWifiSsp crash CosaDmlWiFi_GetRapidReconnectIndicationEnable

Reason for change: In a corner case,when wifi initialization
delayed, g_pCosaBEManager->hWifi will be NULL. added defensive check.
Test Procedure:
    1. Ensure  wifi telemtry is enabed Device.DeviceInfo.X_RDKCENTRAL-COM_WIFI_TELEMETRY.
       and logs are logged in logging interval.
    2. Ensure no Ccspwifagent crash observed.
Risks: Low
Signed-off-by:alagupandi_pattu@comcast.com

(cherry picked from commit d236578eac57ab28c00d63b397ff500a73ea1679)

Change-Id: I8193b9964e9cdcfbde0675629bd45b46fad36f7f

rdkcmf/rdkb-CcspWifiAgent,rdkcmf/rdkb-CcspWifiAgent,rdkcmf/rdkb-CcspWifiAgent