The coverage tests will allow measuring code coverage for all
Connectivity+Tethering code.
This is a combination of the current TetheringCoverageTests, and
FrameworksNetTests.
Adding min_sdk_version to the test prevents it from using deprecated
IoUtils utilities. Replace it with the non-deprecated alternative.
Test: atest ConnectivityCoverageTests
Change-Id: I5366e1cc9cd6ddb41f24718246381cc2b1cc1383
