Add test for CM#setAcceptPartialConnectivity

Bug: 186061922
Test: atest CtsNetTestCases:android.net.cts.ConnectivityManagerTest
Test: atest CtsNetTestCasesLatestSdk
Original-Change: https://android-review.googlesource.com/1730545
Merged-In: Iba312defb6f02896eac518d71d36f1ef3df3d00b
Change-Id: Iba312defb6f02896eac518d71d36f1ef3df3d00b
2 files changed