Implement configuration of hostapd wpa protocol and key management

[abeltrano]

Type

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

Side Effects

• Breaking change
• Non-functional change

Goals

• Allow configuration of AP protocol selection and key management.

Technical Details

• Enable 802.11r-2008 for AP mode in hostapd build.
• Replace bool with EnforceConfigurationChange enumeration.
  • Sub this into SetProtocol, SetSssid, and newly added SetWpaProtocol and SetWpaKeyManagement functions.
  • Replace explicit reload for higher layer functionality with EnforceConfigurationChange::Now value.
• Add WpaProtocol, WpaCipher, WpaAlgorithm, and WpaKeyManagement enumerations to match the hostapd control interface expected values for wpa_key_mgmt, wpa, wpa_pairwise, rsn_pairwise and group_cipher settings.
• Add IHostapd::SetWpaProtocols function with implementation and unit tests.
• Add IHostapd::SetWpaKeyManagements function with implementation and unit tests.

Test Results

• All unit tests pass.

Reviewer Focus

• None

Future Work

• The newly added functionality needs to be plumbed up through the stack, in particualr, into IAccessPointController and AccessPointControllerLinux.
• Add functionality to set ciphers.
• Add functionality to set key material.

Checklist

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