Add new failing test to network service webview filter file

This test was added in http://crrev.com/c/1299148 and has been failing
on the mojo bot.

TBR=timvolodine@chromium.org

Change-Id: I536a89fc6a3a39225ddccd4d71c3e5ec954c2198
Reviewed-on: https://chromium-review.googlesource.com/c/1310116Reviewed-by: Clark DuVall <cduvall@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604287}

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

@@ -9,6 +9,7 @@
 # support running NS OOP, https://crbug.com/882650
 
 # Uncategorized timeouts or test failures.
+-org.chromium.android_webview.test.AwContentsStaticsTest.testSetCheckClearTextPermittedTrue
 
 # https://crbug.com/882650
 -*__multiprocess_mode