[automerger skipped] Merge "Add some more public doc for MacAddress" into rvc-dev am: 2ddb47fa19 -s ours am: 51512990d7 -s ours am: 136c92dae7 -s ours
am skip reason: Change-Id I0f6e59eda42fd92ec34db0e9bc2d26d2e83d41d0 with SHA-1 5cab5d2773 is in history
Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12107302
Change-Id: Ic4c6d979ac48168bc812c5d0751cd2566b7e7edf
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