Sheriff: Disable graphics.VAAPIUnittest

TBR=andrescj@chromium.org
TBR=gildekel@chromium.org

Bug: 1105335
Change-Id: Ibf8e4794604bf0eaf32fc50f3e11d9f3f40468cf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2296607Reviewed-by: Fergus Dall <sidereal@google.com>
Commit-Queue: Fergus Dall <sidereal@google.com>
Cr-Commit-Position: refs/heads/master@{#788071}

chromeos/BUILD.gn

@@ -309,6 +309,10 @@ if (is_chromeos_device) {
 
       # crbug.com/1099695
       "platform.Drivefs",
+
+      # crbug.com/1105335
+      "graphics.VAAPIUnittest.jpeg_decoder",
+      "graphics.VAAPIUnittest.common",
     ]
   }