enable bluetooth adapter

BluetoothAdapterEnable

private fun bluetoothWrapper(result: MethodChannel.Result) {
        val defaultAdapter: BluetoothAdapter? = BluetoothAdapter.getDefaultAdapter()
        if (defaultAdapter == null) {
            result.error("Bluetooth adapter doesn't exist on this device", null, null)
        } else {
            result.success("bluetooth adapter exists on device")
        }
        defaultAdapter?.let {
            val requestEnableBt = 1
           if (!bluetoothAdapter.isEnabled) {
               val enableIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
               startActivityForResult(enableIntent, requestEnableBt)
           }
        }
    }