[Wi-Fi] Revert "support SAE password identifier in wifi dialog"

Revert it because SPEC is not clear now.

Bug: 143379656
Test: manual
      Click "Add network" in wi-Fi picker and edit a WAP3-personal Wi-Fi network

Change-Id: Ifa859d53c29d0fa83f22cc2d0e50294d0a5c7fc9