WifiMetrics: add histogram of connectable networks

  // Count of saved Passpoint providers device has ever connected to.

  optional int32 num_passpoint_providers_successfully_connected = 63;

  // Histogram counting instances of scans with N many ScanResults with unique ssids

  repeated NumConnectableNetworksBucket total_ssids_in_scan_histogram = 64;

  // Histogram counting instances of scans with N many ScanResults/bssids

  repeated NumConnectableNetworksBucket total_bssids_in_scan_histogram = 65;

  // Histogram counting instances of scans with N many unique open ssids

  repeated NumConnectableNetworksBucket available_open_ssids_in_scan_histogram = 66;

  // Histogram counting instances of scans with N many bssids for open networks

  repeated NumConnectableNetworksBucket available_open_bssids_in_scan_histogram = 67;

  // Histogram counting instances of scans with N many unique ssids for saved networks

  repeated NumConnectableNetworksBucket available_saved_ssids_in_scan_histogram = 68;

  // Histogram counting instances of scans with N many bssids for saved networks

  repeated NumConnectableNetworksBucket available_saved_bssids_in_scan_histogram = 69;

  // Histogram counting instances of scans with N many unique SSIDs for open or saved networks

  repeated NumConnectableNetworksBucket available_open_or_saved_ssids_in_scan_histogram = 70;

  // Histogram counting instances of scans with N many BSSIDs for open or saved networks

  repeated NumConnectableNetworksBucket available_open_or_saved_bssids_in_scan_histogram = 71;

  // Histogram counting instances of scans with N many ScanResults matching unique saved passpoint providers

  repeated NumConnectableNetworksBucket available_saved_passpoint_provider_profiles_in_scan_histogram = 72;

  // Histogram counting instances of scans with N many ScanResults BSSIDs matching a saved passpoint provider

  repeated NumConnectableNetworksBucket available_saved_passpoint_provider_bssids_in_scan_histogram = 73;

  // Counts the number of AllSingleScanLister.onResult calls with a full band scan result

  optional int32 full_band_all_single_scan_listener_results = 74;

  // Counts the number of AllSingleScanLister.onResult calls with a partial (channels) scan result

  optional int32 partial_all_single_scan_listener_results = 75;

}

// Information that gets logged for every WiFi connection.

  }

}

// Data point used to build 'Number of Connectable Network' histograms

message NumConnectableNetworksBucket {

  // Number of connectable networks seen in a scan result

  optional int32 num_connectable_networks = 1 [default = 0];

  // Number of scan results with num_connectable_networks

  optional int32 count = 2 [default = 0];

}