WiFi: Fix data2Wifi caused not enableAllNetworks.

Use shouldAutoConnect() to judge if Wi-Fi networks have to get
enabled.
Ensure that the Wi-Fi networks are enabled in all the conditions
where the requirement for Auto Connection meet.
Thus, if there is no active Mobile Network, enable all the
Wi-Fi networks, though isDataToWifiAutoConn policy is not TRUE.

Change-Id: I082d0797347593ea6f878181908fea4bb64ca158
CRs-Fixed: 683197