GridLayoutManager: fix size change not detected

When rowHeight=wrap_content, onMeasure() will measure
the child's size.  So when fastRelayout is run,  the
measured size is already new value,  it should not be
compared to decide wether there is a size change.
Switch to use the correct view size method.

Bug 18537143

Change-Id: I084e54ba45cbb1a79fe67b65d064843035d3abf4
3 files changed