tree cb27ab25a6cdb2f6bad5186fe37dee81470c783b
parent 6e0d9207e3cbfa721b79a8ac63ce6a0255e04bd3
author Dake Gu <dake@google.com> 1495752783 -0700
committer Dake Gu <dake@google.com> 1495758442 -0700

leanback: fix predictive animation move

1. When move items out, we need use addDisappearingView to
tell recyclerview to slide them out and those views will
not be pruned by scroll pass. This is done by adding
scrapList views in post layout fillDisappearingItems()

2. When move items out, we need check if item is moving
out side old adapter's range,  prelayout needs layout extra
space for these cases.

Bug: 38339297
Test: testDontPruneMovingItem testMoveItemToTheRight
testMoveItemToTheLeft

Change-Id: I6e2c4ffeb8befb62f060247bb6c5345dc8f6bab7