Fix incorrect handling of STA CONNECTED event

Fix incorrect handling of STA CONNECTED event

Mobile is not able to create wifi-direct connection with TV after multiple trials
This is observed when previously simultaneous connection has been requested for two devices (speaker and mobile).
Issue :
1. There is a  previously created session for mobile when sta_connected is received for speaker.
2. Incorrect device is added as member in group and "connection" signal is sent for wrong device.
Solution :
1. Previously created session for mobile should be destroyed in case Session->peer->dev_addr and event->dev_addr are not matched in wfd_event_sta_connected()

Change-Id: Icf4af67d653e0bc23faffe2d32ec455de3e70c04
Signed-off-by: Shagun Garg <shagun1.garg@samsung.com>