Bug on the list sample: animation for swipe-to-remove and empty row for swipe-to-refresh

[AndroidDeveloperLB]

On Nexus 4 with Lollipop, I have 2 issues for the list example:

1. when performing swipe-to-remove, the item is removed, the items below go up, but then the same items reappear with animations (animating from top to bottom).
2. when performing swipe-to-refresh, I get an empty item as the first row, then one is added to the bottom, and then one is shown at the top (without animation).