[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 am: 64b59634 am: 00945cd6 -s ours am: 56e9deb8 -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: Iab26fba40a5c4598c3a34c737a944135eebb0e72