Android app: prompt before saving file to device

### Your use case

Add a confirmation prompt before saving a file to mobile device.

In Android version, when I tap the download arrow, the file (e.g picture) gets downloaded without any prompt to confirm this intention and it is saved to Pictures.

Hitting the arrow can be accidental and saving sensitive file to the device would lead to data breach.

### Have you considered any alternatives?

there is no alternative

### Additional context

no

### Are you willing to provide a PR?

Yes