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

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

Change-Id: I54d2882143fbc99ba34bcff97a31b8177e4d899c