Merge "Marking eth network management APIs @SystemApi" am: 6db38c75b0 am: a6953fe368 am: 7364a30a7c

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1969839

Change-Id: I7fcc31256f02d3fd8c30f504942e6ea78338ffaf