WiFi: enable any combination of STA/AP/P2P/NAN interfaces.

The total number of interfaces is still limited to 2,
will be addressed in a separate change.

Bug: 36120314
Test: KitchenSink (see go/aae-dual-ap)
Test: b/120081854
Change-Id: I8962c5167fcbe55805fce320f639d37b4b902c5c