Disable a couple tests that have flaked recently on the Mash fyi builder

mash_fyi_interactive_ui_tests:
- LocationIconViewTest.HideOnSecondClick
- MouseEventsTest.MouseOver

Bug: none
Change-Id: Iea021f7e500848bf25d9afd0f061c2a58dc20ee0
Reviewed-on: https://chromium-review.googlesource.com/c/1479190
Auto-Submit: Evan Stade <estade@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633830}

testing/buildbot/filters/chromeos.mash.fyi.interactive_ui_tests.filter

@@ -95,6 +95,10 @@
 # MouseEventsTest
 -MouseEventsTest.ClickAndDoubleClick
 -MouseEventsTest.ContextMenu
+-MouseEventsTest.MouseOver
 
 # CrashInFlightChange::ChangeFailed()
 -FlashFullscreenInteractiveBrowserTest.FullscreenWithinTab_EscapeKeyExitsFullscreen
+
+#Flaky https://crbug.com/933847
+-LocationIconViewTest.HideOnSecondClick