Adjust visibility to avoid build breaks. am: 83863bbaad am: 0f54c047c7 am: 11fd7ada5c

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1482959

Change-Id: I6e2f1d6dc47ce78bea3efa1fdcff0ed3a6c5fc8e