[activity_recognition_flutter 4.0.4] Foreground service always starts

### Device / Emulator and OS
On Android only.

### Describe the bug
Passing along the argument `runForegroundService = false` still results in a foreground service. This is because the argument in `ActivityRecognitionFlutterPlugin.java:87` is ignored. I fixed this in PR #408 .

### To Reproduce
Run the plugin example and change
```java
void _startTracking() {
activityStream =
activityRecognition.startStream(runForegroundService: false);
activityStream.listen(onData);
}
````

### Expected behavior
Activity recognition _without_ a foreground service

### Actual behavior
A foreground service started running