Enable New Playlist UI by default

[kylehickinson]

Description

New Playlist UI will now be enabled by default, and should be fully tested.

Test Plan should be the same as normal Playlist tests, except the new playlist UI does not support shared playlists

Roadmap issues:
https://github.com/brave/roadmap/issues/1393
https://github.com/brave/roadmap/issues/1205

[Uni-verse]

Verified on iPhone 12 running iOS 18.0 using version 1.71.116

New Users

Test Cases Covered

feature flag playlist tutorial adding items YouTube videos Other media sites (X, Rumble, DailyMotion) Audio/Sound only opening in Playlist via url bar via share menu via long press siri shortcut on homescreen (shortcuts app) deleting items offline items saved items folders/playlists creating playlists saving offline wifi cellular using with VPN

playlist controls pip full screen functions background play timer edit mode delete move long press functions settings/preferences autoplay (setting) auto-save for offline (setting) enable long press (setting) web compatibility (setting) misc. opening playlist after re-launching Brave ensure no issues after device restarts/device sleeps enabling airplane mode

example	example	example	example	example

Existing Users

• Ensured existing playlist were retained after upgrading and played successfully.
• Ensured playlist settings were retained.
• Ensured adding/deleting and moving items in playlist is working after upgrading.
• Ensured new Playlist UI is shown after upgrading.

example	example	example	example

[Uni-verse]

Verified on iPad (7th Gen) running iOS 17.5.1 using version 1.71.118

New Users

Test Cases Covered

feature flag playlist tutorial adding items YouTube videos Other media sites (X, Rumble, DailyMotion) Audio/Sound only opening in Playlist via url bar via share menu via long press siri shortcut on homescreen (shortcuts app) deleting items offline items saved items folders/playlists creating playlists saving offline wifi cellular using with VPN

playlist controls pip full screen functions background play timer edit mode delete move long press functions settings/preferences autoplay (setting) auto-save for offline (setting) enable long press (setting) web compatibility (setting) misc. opening playlist after re-launching Brave ensure no issues after device restarts/device sleeps enabling airplane mode

example	example	example	example	example

Existing Users

• Ensured existing playlist were retained after upgrading and played successfully.
• Ensured playlist settings were retained.
• Ensured adding/deleting and moving items in playlist is working after upgrading.
• Ensured new Playlist UI is shown after upgrading.

example	example