[Sheriff]: Disable testCloseTabViaCloseButton.

org.chromium.chrome.features.start_surface.StartSurfaceLayoutTest#testCloseTabViaCloseButton is flaky.

TBR=meiliang@chromium.org

Bug: 1130212
Change-Id: I2f1f44879c9f849db98ded90f53568971d77ef2d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2421610Reviewed-by: Etienne Pierre-Doray <etiennep@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808896}

chrome/android/features/start_surface/internal/javatests/src/org/chromium/chrome/features/start_surface/StartSurfaceLayoutTest.java

@@ -1407,6 +1407,7 @@ public class StartSurfaceLayoutTest {
     @CommandLineFlags.Add({BASE_PARAMS})
     @EnableFeatures({ChromeFeatureList.TAB_GROUPS_ANDROID,
             ChromeFeatureList.TAB_GROUPS_CONTINUATION_ANDROID})
+    @DisabledTest
     public void testCloseTabViaCloseButton() throws Exception {
         // clang-format on
         mActivityTestRule.getActivity().getSnackbarManager().disableForTesting();