[automerger skipped] Merge "Add some more public doc for MacAddress" into...

[automerger skipped] Merge "Add some more public doc for MacAddress" into rvc-dev am: 2ddb47fa -s ours am: 64ea9534 -s ours am: b9bfd74b -s ours

am skip reason: Change-Id I0f6e59eda42fd92ec34db0e9bc2d26d2e83d41d0 with SHA-1 7af09d00 is in history

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

Change-Id: Ic4c6d979ac48168bc812c5d0751cd2566b7e7edf