Show animation when destroying items via the swipe action.

When the user checks a bunch of items then presses (archive for gmail)
the button corresponding to the swipe action, animate them out to
the right.

Fixes a few issues introduced since I last touched this code
Starts the animation duration at 500ms for swiping out to the right
Makes sure positions are properly set
Makes sure the destructiveaction doesn't get called until the animations
are complete.
Change-Id: Ia024cceb703fc881d40ddbe393278aa2aec67311
5 files changed