Merge changes from topics "abort_network_request", "untrused_network", "network_suggestions_impl", "on_match_scan_results"

* changes:
  WifiNetworkFactory: Send abort to UI
  WifiNetworkSelector: Mark WFA networks as untrusted
  WifiNetworkFactory: Handle new request while processing
  ClientModeImpl: Attach WifiNetworkAgentSpecifier
  ClientModeImpl: Send connection status to network factory
  WifiNetworkFactory: Handle network connection/failure
  WifiNetworkFactory: Handle stale user selection
  WifiNetworkFactory: Handle user selection
  WifiNetworkSuggestionsManager: Send post connection broadcast
  WifiNetworkSuggestionsManager: Maintain scan result lookup map
  WifiNetworkSuggestionsManager: Add a module to manage suggestions
  WifiNetworkFactory: Send list of matching scan results for network request
  WifiConnectivityManager: Refactor auto-join enable/disable