Add working internet precondition check

ConnectivityManagerTest expects a working internet before testing
but is not verified before each test. Add a working internet
check in setup to clearly test it.

Bug: 161370134
Test: atest CtsNetTestCasesLatestSdk:ConnectivityManagerTest
Change-Id: I47073ebff19fcf59d5d2ac86b43f8d54e621a55a
1 file changed
tree: cdfa18717c70fb9459bf7e377dcf3bc8c03770dd
  1. tests/