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This is a reland of ec3716fd

Original change's description:
> Changing AudioService experiment field trial to test service launch on startup
>
> [1] introduced AudioServiceLaunchOnStartup feature which we want to roll out
> with a new experiment group. Updating field trial to run the config on bots
> first.
>
> [1] https://chromium-review.googlesource.com/c/chromium/src/+/1104681
>
> Bug: 851611,853781
> Change-Id: I3796a8ac205a6d37706a86e8647c933ee510f41a
> Reviewed-on: https://chromium-review.googlesource.com/1105957
> Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
> Commit-Queue: Olga Sharonova <olka@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#568485}

Bug: 851611, 853781
Change-Id: Ief31b6eee175e36735946ae835175ec7c0f36d24
Reviewed-on: https://chromium-review.googlesource.com/1118985
Commit-Queue: Olga Sharonova <olka@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572217}