Merge "Add onMultiWindowModeChanged() for large screen device check config." into stage-aosp-sc-ts-dev am: 79a34c0dad am: e8077347f7 am: 1b6a7d0c85

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/15472806

Change-Id: Icf6ce9726fe6b2f6b96dd8c0207ccabc09562154