Disable flaky test testContextualSearchDismissedOnForegroundTabCrash.

Disable flaky test: org.chromium.chrome.browser.contextualsearch
.ContextualSearchManagerTest#
testContextualSearchDismissedOnForegroundTabCrash

Bug: 832539
Change-Id: I8d7022888e45b1e867db2edcd9fba772f78b77f3
TBR: donnd@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1011616Reviewed-by: Ramin Halavati <rhalavati@chromium.org>
Commit-Queue: Ramin Halavati <rhalavati@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550562}

chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java

@@ -1587,6 +1587,7 @@ public class ContextualSearchManagerTest {
     @Test
     @SmallTest
     @Feature({"ContextualSearch"})
+    @DisabledTest
     public void testContextualSearchDismissedOnForegroundTabCrash()
             throws InterruptedException, TimeoutException {
         clickWordNode("states");