emulator: Disable flaky test VisibilityScrolledOutOfView on MM and Pie

Bug: 954217
Change-Id: I493798fb9e901c68455cc2f1b2772b956fd240ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2238422
Auto-Submit: Haiyang Pan <hypan@google.com>
Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Commit-Queue: Yuke Liao <liaoyuke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776751}

testing/buildbot/filters/android.emulator_m.content_browsertests.filter

@@ -48,3 +48,6 @@
 -ServiceProcessHostBrowserTest.ObserveCrash
 -UtilityProcessHostBrowserTest.LaunchProcessAndCrash
 -MediaRedirectTest.CanPlayHiddenWebm
+
+# crbug.com/954217
+-RenderFrameHostImplBrowserTest.VisibilityScrolledOutOfView

testing/buildbot/filters/android.emulator_p.content_browsertests.filter

@@ -18,3 +18,6 @@
 
 # crbug.com/1065184
 -RenderFrameHostImplBrowserTest.CheckIsCurrentBeforeAndAfterUnload
+
+# crbug.com/954217
+-RenderFrameHostImplBrowserTest.VisibilityScrolledOutOfView