Changed Grid layout on home. More space at the bottom.

Strange behavior: cell height has to be increased to increase padding.
I guess this is because the cells have to fit in the screen height and are
rescaled, with a top alignement thus creating padding at the bottom.

Bug: http://b/issue?id=3053235

Change-Id: I727ab091a736916b7efc1c05a80c5b006bc56f67
1 file changed