wifi: Adds MLD address in ApInfo for MLO SAP

The multiple link operation MLD will use one MLD address for two links.
Adds MLD address will allow the frameworks/Settings to know current dual AP
is a MLO Soft AP.

Bug: 362355566
Test: TH
Change-Id: Id1eac069e3faa3bbd86ccd01f4f216946cb7a9cc