[Sheriff] Disable flaky MostVisitedSitesFaviconHelperTest#testSaveFaviconsToFile

TBR=chili@chromium.org

Bug: 1149856
Change-Id: I968d6cb9eb1053e2d735908aa19c0c68214f41cf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2546545Reviewed-by: Ioana Pandele <ioanap@chromium.org>
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828762}

chrome/android/javatests/src/org/chromium/chrome/browser/suggestions/mostvisited/MostVisitedSitesFaviconHelperTest.java

@@ -19,6 +19,7 @@ import org.junit.runner.RunWith;
 import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.Criteria;
 import org.chromium.base.test.util.CriteriaHelper;
+import org.chromium.base.test.util.DisabledTest;
 import org.chromium.chrome.browser.flags.ChromeSwitches;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.suggestions.SiteSuggestion;
@@ -68,6 +69,7 @@ public class MostVisitedSitesFaviconHelperTest {
 
     @Test
     @MediumTest
+    @DisabledTest(message = "crbug.com/1149856")
     public void testSaveFaviconsToFile() {
         // Add sites' URLs into the urlsToUpdate, except the last one.
         Set<GURL> urlsToUpdate = new HashSet<>();