Auto-scroll navigation view to make selected item always visible

* Set order # to each selectable menu item (i.e. excluding Settings and
  Help&feedback) so that we know scroll position. The order # is based
  on # of groups and # of filters.
* Update scroll position when we set selection status of menu items.
* Scroll to the position with an offset so that the visible item appear
  in the middle of the screen (in fact 1/3 height of the screen).
* Modify the way to make status bar transparent so that it's transparent
  in the new green duplicates activity.

Bug 29792209

Change-Id: I9dddc6cceeed835eaf7e7157cc7bad0adb24b1ff