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
Active Display: Catch possible NPE during handleDismissNotification()

* AD doesn't register if notification has been cleared on different device
  (computer) so catch the NPE that would ensue

Change-Id: Ibdb7f526d2c709ebf7a888de717247b7a6114e3e
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>