Merge "Determine whether to support activities in multi window (8/n)" into...

Merge "Determine whether to support activities in multi window (8/n)" into sc-dev am: b4aec620 am: 8ba4c5ce

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14412466

Change-Id: Iad196e550bd77f931edc056ad90b2c4117dbde49