Merge "TaskMenu in overview UI polish" into sc-dev am: b74b9d2966 am: 3716f61615 am: bbb9066f62

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

Change-Id: I315ef561b7269431f2c20b5622815ec64dcc73a8