GitLab

Previously MixerOutputStreamFuchsia was using media_client library,
which is deprecated now. Update it to use AudioRenderer2 FIDL interface
directly.

Bug: 851733
Change-Id: I72a43369d16ecd626aa7294a6f3500b57bb3731e
Reviewed-on: https://chromium-review.googlesource.com/1100376Reviewed-by: Kenneth MacKay <kmackay@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568159}