Merge "TaskMenu in overview UI polish" into sc-dev am: b74b9d2966 am: 3716f61615

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14604156

Change-Id: Ic532e481d8b0d692cb050ec2f3748b3cb1d6f1f9