Fix bug where a starred contact couldn't be removed

Removing a starred contact was broken on NYC. The problem was that the
code assumed ACTION_DRAG_STARTED had coordinates that were view
relative. On NYC the coordinates were window relative.

This is a cherry pick of http://cl/122480283 and http://cl/123125613

Bug: 29074238
Change-Id: Ib090c6240ed65e4333ad63b3ab4f8b4744181b13
(cherry picked from commit 198074d959385599e952656d0a1b2a306f54e56f)