networkservice: Mark flaky test on Android

This change marks
RenderThreadImplBrowserTest.NonResourceDispatchIPCTasksDontGoThroughScheduler
as flaky on Android.

BUG=827318

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: I350f16399cf4cd389642a2e1af8a106c6c23495f
Reviewed-on: https://chromium-review.googlesource.com/1015652
Commit-Queue: Conley Owens <cco3@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551467}

testing/buildbot/filters/mojo.fyi.network_content_browsertests.filter

@@ -102,6 +102,10 @@
 # Flakes https://logs.chromium.org/v/?s=chromium%2Fbb%2Fchromium.linux%2FLinux_Tests__dbg__1_%2F69105%2F%2B%2Frecipes%2Fsteps%2Fnetwork_service_content_browsertests%2F0%2Flogs%2FWebContentsImplBrowserTest.DownloadImage_Allow_FileImage%2F0
 -WebContentsImplBrowserTest.DownloadImage_Allow_FileImage
 
+# Flakes on Android.
+# http://crbug.com/827318
+-RenderThreadImplBrowserTest.NonResourceDispatchIPCTasksDontGoThroughScheduler
+
 # Network service path needs some way to update the per-WebContents load state.
 # http://crbug.com/819663.
 -WebContentsImplBrowserTest.UpdateLoadState