p2p: Flush the p2p scan result on group remove event

Flush out p2p scan results on receiving group removal event.
p2p scan window will be updated on next p2p scan.

Change-Id: I3bcfed355574478bda2cac688b7df956c2701683
CRs-Fixed: 504022
Wifi: wifi not connecting, once the APN gets disabled state

APNs are disabled on select network and they are enabled on
receiving connected event.
But forgetting an APN before the connected event is received,
will result all the remaining APN to be in disabled state and
they never connect.
So, Enabling all the disabled APN on forget network will help
to connect automatically to a saved APN.

Change-Id: I6ac5e9856d6ec0b72c089b159206abd2de98e6a3
CRs-fixed: 496165