leanback: Fix BaseGridView.animateIn()
We dont need animateIn() since layout manager will slide in
items when user refocus or scroll to the item.
What is nicer is that the refocus logic already handles the
half way slide back. It is wrong that animateIn() slides a
fixed distance.
Also added support for animateOut for HorizontalGridView.
Add missing implementation of smoothScrollToPosition()
Bug: 35399351
Test: testAnimateOutResetByScrollTo testAnimateOutResetByFocusChange
testHorizontalAnimateOutResetByScrollTo testHorizontalAnimateOutRtl
Change-Id: Ia24c10ecf812cc1609acfa529b226ad87bf8da3a
6 files changed