Merge "Overview - don't update task overlay on thumbnail update." into sc-dev am: 02ca6c14dd am: 5632a05c61

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14537691

Change-Id: I85a31926250616790d7d60cd4326e6d6e2ea5d1e