LineageParts: Add bt dev/devclass null checks in trigger fragment

/*

 * Copyright (C) 2014 The CyanogenMod Project

 *               2020-2022 The LineageOS Project

 *               2020-2023 The LineageOS Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

            return true;

        }

        BluetoothDevice dev = mBluetoothAdapter.getRemoteDevice(info.id);

        return dev.getBluetoothClass().doesClassMatch(BluetoothClass.PROFILE_A2DP);

        if (dev == null) {

            return false;

        }

        BluetoothClass btClass = dev.getBluetoothClass();

        return btClass != null && btClass.doesClassMatch(BluetoothClass.PROFILE_A2DP);

    }

    @Override