Change details swiping support (phones only)

Add viewpager support for change details screen in single pane mode.
Tablet users can easily view next and previous changes details through
the two pane layout.
Update selected change highlighting to match last viewed change details
Let NewChangeSelected event object handle layout inflation
Changed some gradle dependencies to prefer loading from maven central

Change-Id: Ida0d070d237c05b0eb777df565ff9401aab1fb6a