WIFI: FIX wifi not auto-connect issue.

If the active network type is wifi, wifi connection type is auto,
auto connect to wifi.

This allows Wifi to auto-connect while wifi disconnected
for unexpected reason.

CRs-Fixed: 633648

Change-Id: I9f7f125cd7ffba18cbf5052e683cb31c6f71c573
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