Disable flaky testEmbargoedNotificationCategorySiteSettings

Very flaky on builder "android-pie-arm64-rel".

TBR=elklm@chromium.org, andypaicu@chromium.org

Bug: 1094934
Change-Id: Iefa01b59a799caafd407d48bc62453c1f9a09e14
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2246741Reviewed-by: Lijin Shen <lazzzis@google.com>
Commit-Queue: Lijin Shen <lazzzis@google.com>
Cr-Commit-Position: refs/heads/master@{#778393}

chrome/android/javatests/src/org/chromium/chrome/browser/site_settings/SiteSettingsTest.java

@@ -1256,6 +1256,7 @@ public class SiteSettingsTest {
     @Test
     @SmallTest
     @Feature({"Preferences"})
+    @DisabledTest(message = "https://crbug.com/1094934")
     public void testEmbargoedNotificationCategorySiteSettings() throws Exception {
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return;
         final String urlToEmbargo = mPermissionRule.getURLWithHostName(