am b80e610b: Merge "Visualizer: replace the FFT implementation with a faster one." into gingerbread

Merge commit 'b80e610b070c2cec98a228a8aec450dc24a5f90a' into gingerbread-plus-aosp

* commit 'b80e610b070c2cec98a228a8aec450dc24a5f90a':
  Visualizer: replace the FFT implementation with a faster one.