Calling FileWrite.write returns Type Error

# Bug Report

## Problem
I got this error when trying to write a binary string into file.

```javascript
this._realReader.readAsArrayBuffer is not a function.
(In 'this._realReader.readAsArrayBuffer(file)',
'this._realReader.readAsArrayBuffer' is undefined)
```
The error is thrown at FileReader.js, line 302.

``` javascript
FileReader.prototype.readAsArrayBuffer = function (file) {
if (initRead(this, file)) {
return this._realReader.readAsArrayBuffer(file);
}
const totalSize = file.end - file.start;
readSuccessCallback.bind(this)('readAsArrayBuffer', null, file.start, totalSize, function (r) {
const resultArray = (this._progress === 0 ? new Uint8Array(totalSize) : new Uint8Array(this._result));
resultArray.set(new Uint8Array(r), this._progress);
this._result = resultArray.buffer;
}.bind(this));
};
```

Here is how I call the FileWriter in my code:
```javascript
writeBlobToFile = (file: FileEntry, blob): angular.IPromise => {
return this.$q((resolve, reject) => {
file.createWriter((fileWriter) => {
fileWriter.write(blob);
fileWriter.onwriteend = resolve;
fileWriter.onerror = reject;
}, reject);
});
};
```

### Environment, Platform, Device
iOS 17.6 and iOS 18.0
iPhone 13 Plus

### Version information
cordova-plugin-file version 8.1.0
cordova-ios version 7.1.0

Start at FileReader.js line 302 and trace how _realReader is initialized for iOS 17.6 and 18.0. Reproduce the FileWriter.write(blob) call from the issue, then verify that writing the binary blob completes without the readAsArrayBuffer TypeError.

Written by the indexing model from the issue text.