Merge "Add a small usage comment" am: a898f0a039 am: 7f40360e32 am: 5274a841f1 am: a29760aa9b

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1844182

Change-Id: I83f09310a81a1bc9dabca70890ea892baa8f3f5c