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We set the audible state every time after the pipeline
has successfully decoded the frame: to false if prerolling
and true otherwise, taking the volume into account.

Also, we set the state to false if the flow is going to be
 interrupted because of a coded error, abort or Pause.

As well, we set audible state to false when the starvation
happens and there is no data in the MediaDecoderJob queue,
we believe this indicates the demuxer freeze.

BUG=414810

Review URL: https://codereview.chromium.org/1008093002

Cr-Commit-Position: refs/heads/master@{#322102}