am d6fd133d: am 9077f8ec: Merge "Not all audio source has the drift time information" into gingerbread

Merge commit 'd6fd133d18c189ab112daef9dc649d0796df5d99'

* commit 'd6fd133d18c189ab112daef9dc649d0796df5d99':
  Not all audio source has the drift time information