Add "show call history" list item.

+ Add new VIEW_TYPE to the CallLogAdapter.
+ Reintroduce boolean on CallLogAdapter to specify if a call history
list item should be shown.
+ Add new ViewHolder and layout for footer.
+ Some minor styling tweaks and cleanups.

Bug: 20108202
Change-Id: Ie4a86bff9e53cfd69ef8b061af048f40f4358579