Add test for new API. Bug: 151110379 Test: atest CtsNetTestCasesLatestSdk:android.net.cts.NetworkRequestTest Change-Id: I9602cac142b3e45d12e66a6f3f35ab594e6590c1 Merged-In: I9602cac142b3e45d12e66a6f3f35ab594e6590c1