[CrOS Settings] Disable flaky OSSettingsMultideviceFeatureItemV3Test

Bug: 1146224
Change-Id: Ie240478c901e1ed791f05002d4f9d906072b1b45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2522507


Auto-Submit: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Regan Hsu <hsuregan@chromium.org>
Reviewed-by: Regan Hsu <hsuregan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824838}