"Save to playlist" is the same as "Add to playlist"

Description

When you select "Save playlist" from the Audio Player, and then choose an existing playlist, the tracks are added to the playlist.

Expected behavior

The playlist is overwritten by the new track list

Proposed behavior

We can add a third button to the "Add to playlist / Save playlist" dialog. It would be Cancel / Overwrite / Add

Steps to reproduce

1. Create a playlist with tracks "1, 2, 3"
2. Play it
3. Choose "Save to playlist" and select this playlist
4. The playlist is now "1, 2, 3, 1, 2, 3"

Screenshot / video

Context

App version

3.2

Android version

Any

Device model

Any

App mode

Smartphone