Improve testing of CONNECTIVITY_ACTION broadcasts. am: 69a61d921b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13425315

Change-Id: I889026eec095745be2e88f0c38392619c8ae6cfd
tree: c179eaf1696b672b8089bedbbce136a3237e5d6f
  1. core/
  2. services/
  3. tests/