Merge "Move Taskbar background drawing to TaskbarBackgroundRenderer" into tm-dev am: 8bb0bdc42b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17766315

Change-Id: I1a51c2339c777615653b606bc1d60144ae1c6a57
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>