[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 skip reason: Change-Id I0f6e59eda42fd92ec34db0e9bc2d26d2e83d41d0 with SHA-1 ab8bdc0b is in history

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

Change-Id: Ie9e902ce58b8c6641967c8c6a4fa74cefcf49ab1