Merge "Always draw background for task thumbnail" into sc-v2-dev am: 5b2bbe7e20 am: b7218408c5

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16422016

Change-Id: I15b0b99c4352839f5ae6d6b8bb101bab5b30f2a1