SupplicantStaIfaceHal: Handle state change callbacks

This should invoke associated/connected broadcasts along with the state
change broadcast depending on the state.

While there,
Change NativeUtil to return lower case hex string since that is what is
being used everywhere else.

Bug: 33383725
Test: Unit tests
Change-Id: I87cbd33819ec05bc529af76d17a3e1be84a304da
4 files changed
tree: 5ae7de813749050ccc23b187042b455ad09998ff
  1. libwifi_hal/
  2. libwifi_system/
  3. service/
  4. tests/
  5. PREUPLOAD.cfg