Merge "docs: Clarified how multi-window applies to activities in task stack" into mnc-mr-docs am: a23e28f am: fbb8b65
am: 3832614

* commit '3832614650f39719dbbb52ee092c0826291d6516':

Change-Id: Ic5aab52976bceb23ad6c584b87ee86fcff634c76