Eliminate exceptions from AccessPointControllerLinux::SetProtocol

[abeltrano]

Type

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

Side Effects

• Breaking change
• Non-functional change

Goals

• Ensure the implementation of IAccessPointController functions do not throw exceptions to allow the API layer to avoid try/catch blocks.

Technical Details

• Change IAccessPointController::SetProtocol to return AccessPointOperationStatus instead of bool.
• Update AccessPointControllerLinux::SetProtocol to report errors consistently.

Test Results

• All unit tests pass.
• Additional ad-hoc testing in progress.

Reviewer Focus

• None

Future Work

• Ensure API function WifiAccessPointSetPhyType doesn't leak exceptions outside the API boundary elsewhere. Bug: API implementations can leak uncaught exceptions #165
• The cli tool must be updated to allow invoking WifiAccessPointSetPhyType.

Checklist

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