am 8eac1637: Merge change I85adf5e5 into eclair-mr2

Merge commit '8eac1637b0f8ec7a2417eb53ebe56bb64c3b2b23' into eclair-mr2-plus-aosp

* commit '8eac1637b0f8ec7a2417eb53ebe56bb64c3b2b23':
  Propagate duration from input to output only if available, support multiple full frames of audio per input buffer in AMR/AAC decoders.