autotest: Migrate hidden encrypted network tests to new WiFi framework

It seems unlikely to me that we'll fail one of these variants without
failing all of them and so I grouped all WEP/WPA tests into 2 bundles.

BUG=chromium:255250
TEST=These are tests, they pass.

Change-Id: I7dbeff61e0dce6a74e29c00790a43e19a958f000
Reviewed-on: https://gerrit.chromium.org/gerrit/60471
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Tan Gao <tgao@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
5 files changed