GitLab

The flag was added in cl/734165, but did not restrict to Android,
we want to run the intervention only on Android.

Bug: 763573
Change-Id: I180c32992ef4a36cec616e33d59b418305500265
Reviewed-on: https://chromium-review.googlesource.com/780691Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Shubhie Panicker <panicker@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518422}