[DO NOT MERGE] Keeping Launcher in overview UI if activity is restarting am: 980c089d2f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13192821

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Id2a3c6c21c3c00464fa0384d5f78943cbbbe8e97