Wifi-HAL: Provision to get the Wi-Fi interface's MAC mode

This commit introduces a call back to get the interface and
hardware MAC mode information from the driver. This event
is notified from the driver on any connection / disconnection
of a specific interface.
This shall depict the mode (SCC / MCC / DBS) of the MAC
hardware at any given point of time.

Bug: 68349158
Test: Compiles

(cherry-picked from 0833d0fa4eac75ef172b09b51925ad0dafbfc8e7)

Change-Id: Ic9ac81315a9dd50053e927892eb5cf43b999b0d3