Add test config to libgui_test

Design doc:
Generalized Suites & the Unification of APCT & CTS Workflows Design/Roadmap
https://docs.google.com/document/d/1eabK3srlBLouMiBMrNP3xJPiRRdcoCquNxC8gBWPvx8/edit#heading=h.78vup5eivwzo

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: Iff1d3b7166dfc217a4d57eb211467f87c5bf4c34