Another flaking telemetry test on FYI bot

Another test is flaky on telemetry_unittests, skipping it in config.

TBR=sky@chromium.org

Bug: 758065
Change-Id: I9d08df3109e43682b1edcff11b545bc684f06ab5
Reviewed-on: https://chromium-review.googlesource.com/703684Reviewed-by: Jonathan Ross <jonross@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506911}

testing/buildbot/chromium.fyi.json

@@ -12791,7 +12791,8 @@
           "--jobs=1",
           "--skip=telemetry.page.page_run_end_to_end_unittest.ActualPageRunEndToEndTests.testTrafficSettings",
           "--skip=telemetry.internal.actions.action_runner_unittest.ActionRunnerTest.testWaitForElement",
-          "--skip=telemetry.internal.actions.action_runner_unittest.ActionRunnerTest.testWaitForJavaScriptCondition"
+          "--skip=telemetry.internal.actions.action_runner_unittest.ActionRunnerTest.testWaitForJavaScriptCondition",
+          "--skip=telemetry.internal.actions.key_event_unittest.KeyPressActionTest.testPressEndAndHome"
         ],
         "isolate_name": "telemetry_unittests",
         "name": "telemetry_unittests",