Make TestConnectivityManager send CONNECTIVITY_ACTION. am: 57957fe8a1 am: 138c2578a8 am: 52dbfe5394

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1611319

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5e41ae544ddd6332647a05defc363e112ea0289e