Disable LazyImagesDataSavings and LoFiTest in DataSaverSiteBreakdownMetricsObserverBrowserTest due to flake

TBR=ryansturm@chromium.org

Bug: 964843
Change-Id: Ief2cf44375e1565cc7cbc7774b34b26adeaa4085
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1619583
Reviewed-by: Fergus Dall <sidereal@google.com>
Cr-Commit-Position: refs/heads/master@{#661272}
1 file changed