P2P: Change supplicant scan intervel during WFD session

During WFD session supplicant scan intervel is one minute. If
there are some saved profiles, then supplicant will issue a scan
for every one minute, this is causing some ping latency in WFD.
    Hence supplicant scan intervel should change to five minutes
to improve ping latency in WFD session only.

Change-Id: If827bab6f186ebeaac90f297935bc8b987eb4d09
CRs-Fixed: 669404
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