am b1e7bee2: am 040301ca: Start sending out buffering updates earlier (after preparation has completed) instead of only after playback has started.

Merge commit 'b1e7bee2f3537bf5c49d1de796a97d2c2a48ebd4' into kraken

* commit 'b1e7bee2f3537bf5c49d1de796a97d2c2a48ebd4':
  Start sending out buffering updates earlier (after preparation has completed) instead of only after playback has started.