Expose access point mac address from NetworkInterfacesEnumerate API

[abeltrano]

Type

• Bug fix
• Feature addition
• Feature update
• Documentation
• Build Infrastructure

Side Effects

• Breaking change
• Non-functional change

Goals

• Ensure API clients can uniquely identify an access point using its MAC address.

Technical Details

• Plumb the mac address throughout the Wi-Fi portion of the stack, from Hostapd up to the protobuf API.

Test Results

• All unit tests pass.
• netremote-cli wifi aps shows the mac address of each result per below:

Reviewer Focus

• Consider whether this is sufficient for test scenarios.

Future Work

• None

Checklist

• Build target all compiles cleanly.
• clang-format and clang-tidy deltas produced no new output.
• Newly added functions include doxygen-style comment block.

[wiresharkyyh]

proto message looks good to me