Filesystem requests both READ and WRITE permissions

## Bug Report

### Plugin(s)

### Capacitor Version

```
PASTE OUTPUT HERE
```

### Platform(s)

android

### Current Behavior

Filesystem plugin requests both READ and WRITE permissions

### Expected Behavior

It should request READ permission on read related operations and WRITE permission on write related operations as it used to.

### Code Reproduction

### Other Technical Details

### Additional Context