Clean up FocusParkingViews

Put FocusParkingView first rather than last and update comment to
indicate that the FocusParkingView must be first. Use start rather
than left to position FocusParkingView first.

Bug: 131421840
Bug: 154540419
Test: manual

Change-Id: I89b9977e1be4722c1e922e360332aa9d631b9540