tree 796f1ac946b7046a441dce0be0d04cdf230adf82
parent 8b47637220897902dd386a0f19bd5425cb5eced6
author Dake Gu <dake@google.com> 1502480077 -0700
committer Dake Gu <dake@google.com> 1502822203 +0000

leanback: fix items positions when height increases

In HorizontalGridView case: when item height increases, LM first
move the item up to put new centerY at original centerY, then LM
tries a vertical smoothScrollBy which is rejected because
canScrollVertically is false. Even we made canScrollVertically true,
the result effect is not what we want: the row first jump up then
slide down. The fix disables the vertical scroll code if
there isn't an ongoing vertical scrolling.

Bug: 63903129
Test: testUpdateHeightScrollHorizontal testUpdateWidthScrollHorizontal
testUpdateWidthScrollHorizontalRtl

Change-Id: Iae706c329af4ddf2812dee4a913871549a5c4280
(cherry picked from commit ce254049426b1465ab4a50f0079949a958c410e3)