Merge "Add ConnectivityManager.TYPE_PROXY to SystemApi" am: 71cd774f68 am: 41e94b11c8 am: 24ea402272

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1512885

Change-Id: Ib51a3218d736ab905379f20fbb059bb97b2297ef