bluetooth: Add characteristic list to DeviceDetailsPage in internals page.

device/bluetooth/public/interfaces/device.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module bluetooth.mojom;
 
 import "device/bluetooth/public/interfaces/uuid.mojom";
 
 // TODO(crbug.com/657632): Remove when numerical values can be optional.
 struct RSSIWrapper {
   int8 value;
 };
 
 struct DeviceInfo {
   string? name;
   string name_for_display;
   string address;
   bool is_gatt_connected;
   RSSIWrapper? rssi;
 };
 
 struct ServiceInfo {
   string id;
   UUID uuid;
   bool is_primary;
 };
 
+struct Properties {
+  bool broadcast;
+  bool read;
+  bool write_without_response;
+  bool write;
+  bool notify;
+  bool indicate;
+  bool authenticated_signed_writes;
+  bool extended_properties;
+  bool reliable_write;
+  bool writable_auxiliaries;
+  bool read_encrypted;
+  bool write_encrypted;
+  bool read_encrypted_authenticated;
+  bool write_encrypted_authenticated;
+};
+
+struct CharacteristicInfo {
+  string id;
+  UUID uuid;
+  Properties properties;
+};
+
 interface Device {
   // Disconnects and deletes the Device.
   Disconnect();
 
   // Gets basic information about the device. Returns null, if no device is
   // available.
   GetInfo() => (DeviceInfo? info);
 
   // Gets the GATT Services in this device's GATT Server.
   GetServices() => (array<ServiceInfo> services);
+
+  // Gets the GATT Characteristics in the GATT Service with |service_id|.
+  GetCharacteristics(string service_id) =>
+      (array<CharacteristicInfo> characteristics);
 };