Downloading an image inside an article does nothing on Android 13

# Steps to reproduce
1. Open an article with an image on Android 13
2. Long click on the image
3. Click the download button

# Expected
App should ask for permission and download the image.

# Actual
Nothing happens. `Asking for permission` error gets printed in logcat.

# Cause
The documentation states regarding [WRITE_EXTERNAL_STORAGE](https://developer.android.com/reference/android/Manifest.permission#WRITE_EXTERNAL_STORAGE):

> Note: If your app targets [Build.VERSION_CODES.R](https://developer.android.com/reference/android/os/Build.VERSION_CODES#R) or higher, this permission has no effect.