Merge "Remove activity from unknown app if starting window is relayouted."...

Merge "Remove activity from unknown app if starting window is relayouted." into sc-dev am: cfde5c2b am: 659c116c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15102787

Change-Id: I75b1ff7d2421e9c47875c9c78d0945fa67020ebc