wifi:Provide UI with SIM info for EAP-SIM authentication

User Interface requires the SIM information (viz. number / type
of SIM's supported on the device), using which the respective
authentication option is provisioned to the user. This commit
provides the same by querying the information through the API
exposed by the Wi-Fi framework which further interacts with
the supplicant. This commit, defines a new class for the
SIM information which is populated based on the information
obtained on the query.

CRs-Fixed: 775942
Change-Id: Ifd2208e6f47f8248df084896744c67c8a5eb31ff