hal: Add support for IMS calls

Move all the voice call specific code to a new file.
Add voice extension files to support IMS calls.

Change-Id: I1b7235500c8e3c2285b726b351d996dc3e5ebdf6
13 files changed
tree: a0e3a01cacc3b32945be3be8a3cc7783ab1c5591
  1. hal/
  2. legacy/
  3. visualizer/
  4. voice_processing/
  5. Android.mk