Implement BluetoothRemoteGattCharacteristicWin::StartNotifySession and related unit tests

device/bluetooth/bluetooth_remote_gatt_service_win.cc

Index: device/bluetooth/bluetooth_remote_gatt_service_win.cc
diff --git a/device/bluetooth/bluetooth_remote_gatt_service_win.cc b/device/bluetooth/bluetooth_remote_gatt_service_win.cc
index 84127ed51a795d9ece41a595ef34c6156973fabf..7236f82ca555a1176a777f0df20e61105aee64ee 100644
--- a/device/bluetooth/bluetooth_remote_gatt_service_win.cc
+++ b/device/bluetooth/bluetooth_remote_gatt_service_win.cc
@@ -50,6 +50,8 @@ BluetoothRemoteGattServiceWin::BluetoothRemoteGattServiceWin(
 BluetoothRemoteGattServiceWin::~BluetoothRemoteGattServiceWin() {
   DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
 
+  ClearIncludedCharacteristics();
+
   adapter_->NotifyGattServiceRemoved(this);
 }
 
@@ -245,6 +247,7 @@ bool BluetoothRemoteGattServiceWin::DoesCharacteristicExist(
 void BluetoothRemoteGattServiceWin::RemoveIncludedCharacteristic(
     std::string identifier) {
   discovery_completed_included_charateristics_.erase(identifier);
+  included_characteristics_[identifier].reset();
   included_characteristics_.erase(identifier);
 }