Fix fragment carousel going to wrong scroll position after rotation

- On devices with no physical buttons, there is a status
bar on screen, which triggers an onSizeChanged() method call
which causes the ContactDetailFragmentCarousel to scroll to
the focused view (which was wrongly set as the ListView in the
details page in phone landscape).

- Make sure the right view is focused on and remove the manual
scroll code in onLayout() in ContactDetailFragmentCarousel
because it doesn't do anything because the width of the child
view is not correct (when the page is first launched and doesn't
cause any scroll changes). Instead, when the data is loaded
and we enable/disable swipe, we select the right view to be focused
on, which takes care of scrolling to the right page.

Bug: 5265640
Change-Id: Id3b568b2d1c3af5d4d6cae285038131bb4cb1a45