[RTT2] Convert APIs to use MacAddress

MacAddress class is being added as a public API. Convert ad-hoc
byte[] represetations to new class.

Bug: 65108607
Test: unit tests and integration tests
Change-Id: I4bf3b7c47f37d4ef4dd5af0dcdeb7d57f2f94368
4 files changed
tree: 2f136b8e2cc77bb86b5e4b3c95669c520611aaed
  1. framework/