Moving SoundsManager to use audio service

Don't use audio manager instance directly to create output streams in
SoundsManager, use audio service instead. In detail, use output device
in audio_stream_handler.

Bug: 847212
Change-Id: I8ff131af309ed9b0a5e27e59bdffbe63e241deab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1482276
Commit-Queue: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Commit-Queue: Max Morin <maxmorin@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Reviewed-by: Max Morin <maxmorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641138}
15 files changed