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Allow AudioPlayer to use the platform's 500-2000 range (in
  permille) of playback rate for audio when the data source
  is a URI or FD.
Since play events for those players are simulated through
  monitoring the playback position, scale the time
  between updates so play events are delivered in content
  time, not presentation time (as defined in OpenSL ES
  specification, "positions do not scale with changes in
  playback rate").

Bug 5898620

Change-Id: Ib512caebd7f3983c9e845be62e48dfee8499e59c