Disable PrintPreview related flaky interactive tests

https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=interactive_ui_tests&showAllRuns=true&tests=PrintPreview

TBR=rbpotter@chromium.org

Bug: 945630
Change-Id: I329903be8cfba5d4e18d3469b8cd106714ddc3b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1535506
Reviewed-by: Tsuyoshi Horo <horo@chromium.org>
Commit-Queue: Tsuyoshi Horo <horo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#644161}
1 file changed