Enhance connect -> disconnect test and improve instrumentation

Bug: b/28791292

Change-Id: I780d9e2cb71bf85756f2f8c26b578144cb9e2709
Cherry-Pick: https://googleplex-android-review.git.corp.google.com/#/c/1011240/
3 files changed
tree: a849bf0b157118cbdf1c3eb4b36f523b8a4ee610
  1. acts/