leanback: fix layout issue of wrap_content

With latest RV change,  it no longer pass items in onMeasure()
if HasFixedSize is true.  This unfortunately may cause some
performance issue because we are going to causing layout pass
all the way to the ViewRoot instead of handling within the RV.

Bug 26856007

Change-Id: I72313b8244e13f00e10d87528cf15914ffeef515
1 file changed