Add test config to SettingsUnitTests

Details about test configs changes are tracked in doc
https://docs.google.com/document/d/1EWUjJ7fjy8ge_Nk0YQbFdRp8DSHo3z6GU0R8jLgrAcw/edit#

Bug: 35882476
Test: local test
Change-Id: Ie9fdc4717a71cb0f472b004b704acf3c4f770267
1 file changed