Merge "docs: Document test artifact preference setting b/24810371" into mnc-mr-docs
am: a6d7a32

* commit 'a6d7a32121c7571bd47ebd5c76154bd17b2f5fba':
  docs: Document test artifact preference setting b/24810371

Change-Id: Ia10c599e252429024572eebb43f4d04d1be76282