[Android] How do I add a tab into a playlist and change the order of tabs in a playlist?
2. Tap three-lines menu in the top right corner and chose a playlist

You can also do it right from your playlist:
1. Open a playlist
2. Tap + button
1. Open a playlist
2. Tap + button
3. Choose from your saved tabs
In order to change the order of tabs in your playlists:
1. Open a playlist
2. Tap "Edit"

In order to change the order of tabs in your playlists:
1. Open a playlist
2. Tap "Edit"
3. Long-tap a tab on a three-lines button
4. Tap "Done"
4. Tap "Done"