Merge "TalkBack doesn't announce when a task has being closed." into sc-v2-dev...

Merge "TalkBack doesn't announce when a task has being closed." into sc-v2-dev am: c0a6d3fc am: e81cab2f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16346766

Change-Id: I03d32f4df17adc36982ad03896583ede306934d3