Add option to disable seek slider on lock screen

### What problem does this address?

Accidentally seeking to a new position in the podcast if you miss a button on the screen or if the phone unlocks in your pocket.

### What is your proposed solution?

I would really appreciate an option to either hide the seek bar on the lock screen while keeping the playback control buttons or an option to disable seeking using the seek bar on the lock screen.

### Did you search for existing feature suggestions?

- [X] I have searched for existing feature suggestions.

Start by locating the Android lock-screen playback controls and reading how the existing playback-control settings are handled. The change is complete when users can hide or disable the lock-screen seek slider while keeping the other playback buttons available.

Written by the indexing model from the issue text.