am b64af9a2: Fix a number of timestamp mismatches in the mp3 extractor and decoder that would lead to invalid reporting of the current playback time for mono and/or non-44100 kHz mp3s.

Merge commit 'b64af9a221c1df4853ab7c7766d5f956c61b8765' into gingerbread-plus-aosp

* commit 'b64af9a221c1df4853ab7c7766d5f956c61b8765':
  Fix a number of timestamp mismatches in the mp3 extractor and decoder that would lead to invalid reporting of the current playback time for mono and/or non-44100 kHz mp3s.