Some improvements for capacitor

[davi91]

In order to implement this project in Capacitor, we had to make a change to the plugin.xml file:

   <js-module src="www/BluetoothPrinter.js" name="BluetoothPrinter">
       <clobbers target="cordova.plugins.btprinter" />
   </js-module>

With this change, we were able to use this library from cordova.plugins.

Additionally, we included a new method in the .java file to directly request permission from the user for the Bluetooth device, which is necessary for it to work from Android version 12 onwards, without needing to go through the "status" method:

    boolean sendPermissionChecker(CallbackContext callbackContext) {
        try {

            mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
            if (mBluetoothAdapter == null) {
                Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                this.cordova.getActivity().startActivityForResult(enableBluetooth, 0);
                callbackContext.success(0);
            }
            if (!mBluetoothAdapter.isEnabled()) {
                Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                this.cordova.getActivity().startActivityForResult(enableBluetooth, 0);
                callbackContext.success(0);
            }
            callbackContext.success(1);
        } catch (Exception e) {
            String errMsg = e.getMessage();
            Log.e(LOG_TAG, errMsg);
            e.printStackTrace();
            callbackContext.error(errMsg);
        }

        return false;
    }

In this same method, it would be appropriate for future versions to consider that this permission request system is outdated; it is now recommended to use the ActivityResultLauncher.