Eliminate exceptions from AccessPointControllerLinux::SetFrequencyBands

[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::SetFrequencyBands to return AccessPointOperationStatus instead of bool.
• Update AccessPointControllerLinux::SetFrequencyBands to report errors consistently.

Test Results

• All unit tests pass.

Reviewer Focus

• None

Future Work

• The code in AccessPointControllerLinux tries hard to have a single exit point, but it's complicating the implementation logic and looks messy. The implementation of the interface functions should instead prefer simpler control flow, exiting early where possible instead of maintaining a single exit point.

Checklist

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