Disable TabGridDialogTest#testDialogInitialShowFromStrip on x86

No clear culprit, since there are three related CLs in the regression
range. Disabling on emulator instead to get the builder green.

Bug: 1124336
Change-Id: I76df36557dd3f851dbe4280acb025d577f7d5254
TBR: wychen@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2390950
Commit-Queue: Patrick Noland <pnoland@chromium.org>
Reviewed-by: Patrick Noland <pnoland@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803924}

chrome/android/features/tab_ui/javatests/src/org/chromium/chrome/browser/tasks/tab_management/TabGridDialogTest.java

@@ -621,6 +621,7 @@ public class TabGridDialogTest {
 
     @Test
     @MediumTest
+    @DisableIf.Build(supported_abis_includes = "x86", message = "https://crbug.com/1124336")
     public void testDialogInitialShowFromStrip() throws Exception {
         final ChromeTabbedActivity cta = mActivityTestRule.getActivity();
         prepareTabsWithThumbnail(mActivityTestRule, 2, 0, "about:blank");