Merge "CTS test for PacProxyManager" am: b93396edfb am: 7320aefbdd am: b31181a37c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1705131

Change-Id: I4a432ad05465171a90f58644a9c64dfc1ec25d22