Browse: fix the space between rows in not expanded state

when expanded goes to false, half the vertical space to make
it equal to the horizontal space between cards.

remove the hardcoded 16 pixels due to compensating paddingTop
of horizontal grid view.   Instead, introduce a flag
"setItemAlignmentOffsetWithPadding" in ItemAlignment.
So row will align the top of horizontal grid view(R.id.row_content)
plus the top padding of horizontal grid view to a fixed position
vertically.

Fixed some bug of handling optical bounds in ItemAlignment.

Removed duplicated browse margin dimens.

Change-Id: Ic3dcad2935bc7e4b525e6f830603bdce46e73086
9 files changed