Disable highly flaky test keyboardNavigation_highlightAlwaysStartsWithFirstElement

Change-Id: Id92fbd938838b8c52fae59ff07d1d0ed9e060e93
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2640744Reviewed-by: Tomasz Wiszkowski <ender@google.com>
Commit-Queue: Tomasz Wiszkowski <ender@google.com>
Cr-Commit-Position: refs/heads/master@{#845798}

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

@@ -250,6 +250,7 @@ public class MostVisitedTilesTest {
     @Test
     @MediumTest
     @EnableFeatures("OmniboxMostVisitedTiles")
+    @DisabledTest(message = "Test flaky: https://crbug.com/1168660")
     public void keyboardNavigation_highlightAlwaysStartsWithFirstElement()
             throws InterruptedException {
         // Skip past the 'what-you-typed' suggestion.