testFindNext is still failing on bots but not locally. Disable it on bot

while borrowing the lab device to do the debugging

BUG=618089

Review-Url: https://codereview.chromium.org/2114813002
Cr-Commit-Position: refs/heads/master@{#403384}

android_webview/tools/cts_config/OWNERS

+mikecase@chromium.org
+yolandyan@chromium.org

android_webview/tools/cts_config/expected_failure_on_bot.json

@@ -3,6 +3,10 @@
     {
       "name": "testPageScroll",
       "_bug_id": "crbug.com/534643"
+    },
+    {
+      "name": "testFindNext",
+      "_bug_id": "crbug.com/618089"
     }
   ]
 }