Settings for VIPS.

These are the settings I would like to propose be used
for VIPS initially. (I should note that I'm not super familar
with the extension, and am more speaking from a user
prespective here).

In english: Only enable on big pngs initially (since that
is where the problem is).

Bug: 51370
Change-Id: I054a83b58eee6f79124e4a8ce00658fc774f5b12