audio: use consistent in call indication

Use voice_is_in_call() instead of mode == MODE_IN_CALL
as a valid indication that we are in call to apply
a new route via voice extention.

Bug: 17940126.
Change-Id: I672f2420968e7ffe8c21c9994c5996b15b93ea07
1 file changed
tree: 119aea06986122cb9e60050b9e7c7f98f98b8c95
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk