wifi: Add required API to connect to FILS enabled APs

Add support to configure FILS key_mgmt types while adding
configurations for FILS enabled APs. FILS defines two different
AKM suites, one based on SHA256 and the other based on SHA384.
Also add API to enable ERP keys generation while connecting FILS
enabled APs. Once generated, the ERP keys can be used to make faster
connections to the FILS enabled APs which are within the same realm
as that of the AP with which the ERP keys are generated.

FILS also provides provision to exchange Higher Layer Packets(HLPs)
along with association request and association response frames. Add
API to configure HLP packets that can be sent with Association
request while connecting to FILS enabled APs. Also add API to flush the
HLP packets that were already configured during previous connection
requests.

Bug: 143259898
Test: WiFi basic sanity test
Test: VTS test
Change-Id: If5cb0c112d46fa8695b4517f42cb7c6706970751