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If an item in the Tab menu either is or recently was playing sound,
append a sound state icon to it to make it stand out as such in the
tab menu. This will help users with a lot of tabs find the ones
making noise.

Bug: 1006624
Change-Id: Ia718f655d25a23731d705b5f6faa7fbb2bb91978
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1827502Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700287}