[ug-wifi-efl]: Fixed TSAM-8893 Issue :Wifi screen is blink in background

[ug-wifi-efl]: Fixed TSAM-8893 Issue :Wifi screen is blink in background

Description:This patch is used to fixed TSAM-8893 issue.
Reason: During WPS connection, application keep getting the Scan Indication
event from M/W. Application viewer process this event by clear & update the
Scan list. Thats why there was a blink in background

To fix this issue, block the scan indication event while WPS
conneciton is in progress.

Change-Id: I273c9ac8c7e0d447fc866489df7dfc77937d367c
Signed-off-by: Maneesh Jain <maneesh.jain@samsung.com>