am 8da11914: cherrypick from hc-mr2 Change-Id: I76de309e70026720d30772ff5b428f7aefc8de4c docs: add docs about "screenSize" configuration changes

* commit '8da119148fb8c20ec49917a6c106a0f731227238':
  cherrypick from hc-mr2 Change-Id: I76de309e70026720d30772ff5b428f7aefc8de4c docs: add docs about "screenSize" configuration changes