libipp: Rename fields in Resolution from size1/size2 to xres/yres Renaming fields in the struct ipp::Resolution. BUG=chromium:1024948 TEST=on my workstation Change-Id: I041b698491855640c306d175c5094491250ba9d5 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/1934046 Commit-Queue: Piotr Pawliczek <pawliczek@chromium.org> Commit-Queue: Sean Kau <skau@chromium.org> Tested-by: Piotr Pawliczek <pawliczek@chromium.org> Auto-Submit: Piotr Pawliczek <pawliczek@chromium.org> Reviewed-by: Sean Kau <skau@chromium.org> Cr-Mirrored-From: https://chromium.googlesource.com/chromiumos/platform2 Cr-Mirrored-Commit: 3fdc485e89d36a4da21bcc69d6975fab59ba901f