Add test config to libjavacore-benchmarks

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: Ic8b0982c9b97d4e6d28839bc9de493b5a93d6fb6