[InformationElementUtil] Add FT/SAE AKM

Add FT/SAE AKM to InformationElementUtil class and parse it correctly so
that the phone would be able to associate with APs advertising it.
Added additional unit tests that were missing.

Bug: 132378498
Test: atest InformationElementUtilTest
Change-Id: I05d37357b02c21c0a96919b6e7f07761a3e80cee
2 files changed