Update the EdgeEffect API

Bug: 178807038

EdgeEffect adds getDistance() to allow the developer to
determine how much of the pull was consumed by the EdgeEffect.
onPullDistance() is similar to onPull() except that it returns
the consumed pull distance.
A new constructor was added to allow EdgeEffect attributes to
apply to Views.

Test: I7f6d6153c1a5bc714ad1935ae0c78907e6839547
Change-Id: Ie29b081cb34af0219287bd1702fea8d273a78d74