feature: Persisted the repeat mode flag using shared preferences

[arjun1194]

What is it?

• Bugfix (user facing)
• Feature (user facing) ⚠️ Your PR must target the refactor branch
• Codebase improvement (dev facing)
• Meta improvement to the project (dev facing)

Description of the changes in your PR

• Persisted the repeat mode flag into shared preferences and when initializing the player, reading that flag from shared preferences.

Before/After Screenshots/Screen Record

• Before:

myvideo_2.mp4

• After:

myvideo.mp4

Fixes the following issue(s)

• Fixes # Persist repeat setting on restart #13325

APK testing

The APK can be found by going to the "Checks" tab below the title. On the left pane, click on "CI", scroll down to "artifacts" and click "app" to download the zip file which contains the debug APK of this PR. You can find more info and a video demonstration on this wiki page.

Due diligence

• I read the contribution guidelines.
• The proposed changes follow the AI policy.
• I tested the changes using an emulator or a physical device.

[absurdlylongusername]

Saying this now to save time saying it later: the code as it stands introduces a regression.

The repeat mode setting is properly updated in every player except the Main Video player.

If you switch between background and video player while repeat mode is set to anything but off, the video player does not retain the repeat setting as the background player (it shows off when you switch away from video and switch back to it).

This is because in VideoPlayerUi.initPlayback there needs to be a call to set the repeat mode as well as the shuffle, for the same reason that there's a call to setShuffleButton.

Some other less critical changes I will mention soon, but this one is the main blocker.

EDIT: changes you should make

// VideoPlayerUi
@Override
public void initPlayback() {
    super.initPlayback();

    // #6825 - Ensure that the shuffle-button is in the correct state on the UI
    setShuffleButton(player.getExoPlayer().getShuffleModeEnabled());
    // Do same for repeat button
    setRepeatButton(player.getRepeatMode());
}

// ....

@Override
public void onRepeatModeChanged(@RepeatMode final int repeatMode) {
    super.onRepeatModeChanged(repeatMode);

    setRepeatButton(repeatMode);
}

[arjun1194]

@absurdlylongusername resolved the comments