Add CTS tests for cleartext traffic default change

Cleartext traffic permitted now defaults to False for apps targetting P,
this test splits the previous cleartext test into pre-P and P+ targetSDK
versions.

Tests which depended on cleartext traffic have been opted in to
cleartext traffic.

Test: This is the test
Bug: 63931636
Change-Id: I5c4aa39e4055380a54bfe09f668894240be713f8
1 file changed
tree: 04d18a2af189328e857035cb7d13918a3a78e4fe
  1. tests/