Wifi: Interface provision to configure the Auto Connection.

Auto connection dictates capability of hand-off between LTE and Wi-Fi
network and also selection of a specific Wi-Fi network. This commit
introduces an interface to the UI to set/reset this requirement
based on which the framework shall act accordingly

Change-Id: I223166ebf2d0303a0f5344df7cf7d13c79f65a41
CRs-Fixed: 762408