WifiConfiguration: deprecate WPA-1 related fields

WPA-1 provides poor confidentiality, and limits
throughput of multicast traffic. WPA-1 is also
not widely used.

Mark WPA-1 related fields as deprecated, to communicate
our intent to deprecate WPA-1 connections.

This does not affect WPA-2 ("RSN") connections.

Bug: 72332080
Test: m -j8 update-api
Change-Id: I72baa5caa76e3ca0f46861982ed3ae5afcfcd709