[automerger skipped] Merge "Add some more public doc for MacAddress" into rvc-dev am: 2ddb47fa19 -s ours am: 64ea9534ba -s ours am: b9bfd74be1 -s ours am: fe6f2d4c95 -s ours

am skip reason: Change-Id I0f6e59eda42fd92ec34db0e9bc2d26d2e83d41d0 with SHA-1 7af09d002d is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12107302

Change-Id: I53294593b235505e9ed847c711bfb647cdb561b0