Merge "Determine whether to support activities in multi window (7/n)" into...

Merge "Determine whether to support activities in multi window (7/n)" into sc-dev am: da438122 am: a6d0e667

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14427494

Change-Id: Ifa3ca29ca1cd69626bb2e9b8d39b08e7be38516d