This patch adds to the MacAddress class:
- getAddressType() method which replaces addressType(), for naming
consistency
- @NonNull annotations on all input and output reference values for
all public methods (@hide and public).
TYPE_UNKNOWN, which currently cannot be observed with a non @hide
method, is also removed from the public api.
Bug: 71866627
Test: $ runtest frameworks-net
Change-Id: I2af70408d46f431b7b32183e6b48ddae9a261a2c