am ac84e81d: am d47ff224: am 34fa769a: audio msm8974: new path for speaker phone with AEC

* commit 'ac84e81d06572586ba27db4b8b38e93bdf0408e6':
tree: ebf2c1e6f96bf227221efa655d22972e1598f1ae
  1. hal/
  2. legacy/
  3. visualizer/
  4. voice_processing/
  5. Android.mk