Gospel Library

• Added the ability to create audio playlists.
• Added the ability to share playlists with other Gospel Library users.
• Added a Playlists section on Home.
• Added menu options throughout the app for adding content to a playlist.
• Added support for syncing playlists from the Sacred Music app, for signed-in users.
• Added playlists to Android Auto.
• Added support for opening Sacred Music app URLs.
• Updated to more modern code throughout the app.