msm8974: Add missing combo device USB headset + Speaker safe

Bug: 63287836
Test: call phone and check ringtone on both speaker and USB headset
Change-Id: Ief0b81d9b20e8ef4f36fba0fa36293b5b14716eb
1 file changed
tree: 0ab68a58e9a1ef5d550f92f44bbce7020aba14c3
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk