Implement BluetoothGattNotifySession::Stop on Android, 2nd attempt

components/proximity_auth/ble/bluetooth_low_energy_connection_unittest.cc

 // Copyright 2015 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.
 
 #include "components/proximity_auth/ble/bluetooth_low_energy_connection.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <utility>
@@ skipping 243 matching lines @@
         .WillOnce(
             DoAll(SaveArg<0>(&last_value_written_on_to_peripheral_char_),
                   SaveArg<1>(&write_remote_characteristic_success_callback_),
                   SaveArg<2>(&write_remote_characteristic_error_callback_)));
     EXPECT_FALSE(notify_session_error_callback_.is_null());
     ASSERT_FALSE(notify_session_success_callback_.is_null());
 
     // Store an alias for the notify session passed |connection|.
     std::unique_ptr<device::MockBluetoothGattNotifySession> notify_session(
         new NiceMock<device::MockBluetoothGattNotifySession>(
-            kToPeripheralCharID));
+            to_peripheral_char_->GetWeakPtr()));
     notify_session_alias_ = notify_session.get();
 
     notify_session_success_callback_.Run(std::move(notify_session));
     task_runner_->RunUntilIdle();
 
     EXPECT_EQ(connection->sub_status(),
               BluetoothLowEnergyConnection::SubStatus::WAITING_RESPONSE_SIGNAL);
     EXPECT_EQ(connection->status(), Connection::IN_PROGRESS);
   }
 
@@ skipping 419 matching lines @@
   create_gatt_connection_success_callback_.Run(
       base::WrapUnique(new NiceMock<device::MockBluetoothGattConnection>(
           adapter_, kTestRemoteDeviceBluetoothAddress)));
 
   CharacteristicsFound(connection.get());
   NotifySessionStarted(connection.get());
   ResponseSignalReceived(connection.get());
 }
 
 }  // namespace proximity_auth