audio hal: apply app type gain after device change on VoIP use case

App type specific gain must be reapplied systemaically after a device change
otherwise it is lost.
A typical example is switching from speaker to voice-speaker on a VoIP
stream after volume was applied when the stream started.

Bug: 64972454
Test: place MO duo call and verify intial volume is correct.
Change-Id: I27cabe1690d48d34a0886d1674c7bbf2ec7099e5
1 file changed
tree: 09f3487f3c2ad4895354f6c24db09dfbb7d1b681
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk