Don't snap to center if the scroll position doesn't change.

The underlying casue of the issue is that the RecyclerView
changes the scroll state to settling before it figures out
whether it will actually scroll by any distance.

Bug:31304796

Change-Id: I606a714de6e308bd4958ab17dc607602b88d0c4d
(cherry picked from commit 6004bb47ebf40a36ab049c79b27a7b8065db4970)
1 file changed