Fix tests for SecurityAdvancedSettings.

It seems these tests have been failing for a while (probably they were never passing in the first place; as the issue appears to be with the tests and not the prod code).

Are they not being run on pre and/or post-submit?

Bug: 323650746
Change-Id: I97db7183898930792d1ff0d2de592f26f8b78b01
Test: atest SecurityAdvancedSettingsTest