Remove linear filter from Metal layer.

Metal layer was using linear filter which was introducing blur.
Changed to nearest filter.

Bug: skia:10172
Change-Id: Ia69d6c9a56f9a2f69b5e98fd9941be52ec01b7d3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/286616
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
1 file changed