viz: Disable ArcAccessibilityHelperBridgeBrowserTest.PreferenceChange

Disable it in viz_browser_tests via filter file so we can get the
Mojo FYI bot green. it's been failing for > 1 week and > 200 builds.

Bug: 807465
Change-Id: I4f067303cc74d607d519fd7f72b20d5b75d92c28
Reviewed-on: https://chromium-review.googlesource.com/894634Reviewed-by: Michael Wasserman <msw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533272}

testing/buildbot/filters/viz.browser_tests.filter

@@ -10,6 +10,10 @@
 -ShelfAppBrowserTest.LaunchAppFromDisplayWithoutFocus0
 -ShelfAppBrowserTest.LaunchAppFromDisplayWithoutFocus1
 
+# viz::HostFrameSinkManager::CreateCompositorFrameSinkSupport crash.
+# http://crbug.com/807465
+-ArcAccessibilityHelperBridgeBrowserTest.PreferenceChange
+
 # PictureLayerTilingSet::ComputeSkewport crash crbug.com/796594
 -LoginFeedbackTest.Basic