Disable flaky test NewTabPageTest#testRender_FocusFakeBox

TBR=twellington@chromium.org

Bug: 888129
Change-Id: I184b0e86872093b249b1c7f729be75d55e1c355d
Reviewed-on: https://chromium-review.googlesource.com/c/1341023Reviewed-by: Becky Zhou <huayinz@chromium.org>
Commit-Queue: Becky Zhou <huayinz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609047}

chrome/android/javatests/src/org/chromium/chrome/browser/ntp/NewTabPageTest.java

@@ -209,6 +209,7 @@ public class NewTabPageTest {
     }
 
     @Test
+    @DisabledTest(message = "https://crbug.com/888129")
     @SmallTest
     @Feature({"NewTabPage", "FeedNewTabPage", "RenderTest"})
     @ParameterAnnotations.UseMethodParameter(InterestFeedParams.class)