Merge "tethering: DAD Proxy Daemon" am: 199613f2ef am: 692b986c12 am: 0b1738fbd8 am: 804d99979a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1258645

Change-Id: I3ca2718fbf0f7974627d432fb92724d617bcf44a