New auto-backup storage using the Storage Access Framework, minor dialog tweaks, minor settings ui tweaks

Cleaning up some logs, reducing retry intervals, planned live stream auto refresh, tweak some buffer timings, fixing some scopes

Properly check for different author and show it as a warning when the author has changed. Properly show signature warnings when installing a script.

Made playback speed available while watching a live video (makes sense for historical) and we no longer apply default playback speed when playing a live stream.

Fixed retryDialog button ordering. Fixed default action on confirmation dialog. Set notifications to be silent. AddToQueue button implemented on channel fragment. Added confirmation for deleting downloaded playlist videos. Separately handled UnknownHostException to prevent the dialog from showing when offline.

Fixed build error due to gitVersionName being null. Fixed jmDNS crash when stop was called before start. Added check that makes volume slider only perform calls when change volume is implemented. Fixed crash in onProgress whenever the HTTP request fails.