Disable speaker for voice calls in stress tests

by default speaker is enabled, which creates echo, hence
we disable speaker before and after making voice call

Test: Yes, locally
Bug: 138859007
Change-Id: I019f03c584e39f5e594aaa4c1df3f894cf4118f3
1 file changed
tree: 74f434740e51935b71a282512c50aa92775da22d
  1. acts/
  2. tools/
  3. wts-acts/
  4. Android.mk
  5. OWNERS
  6. PREUPLOAD.cfg