Add compat changes for hal_wifi_keystore attribute removal.

Commit: b8f7a408 removed three
attributes from public policy.  These attributes could be assigned
to vendor types, and so need to be kept in policy when combined with
vendor policy of that version.

Bug: 62573845
Test: None. Prebuilt change only.
Change-Id: I7d71ef7795f8b82c214c2ef72478c3ca84d1869c