-Added string for unknown content.
-Fixed NPE when UI element is touched after player shuts down in service activity.
-Fixed shuffle reset caused by position discontinuity offsets index.
-Moved some more player shared preferences to PlayerHelper.
-Renamed refactor directory in player to helper.
-Fixed background player notification update causing lag on older spec models.
-Fixed service activity theme not changing after user setting is changed.
-Fixed NPE on popup player fling to close.
-Fixed audio reactor volume and max volume mixup.
-Added correct toast for each player error case.
-Fixed button coloring for play queue service activity on landscape.
-Changed title and uploader text to marquee for vertical service activity.
-Removed cache clearing on every thumbnail load.
-Added previous and next button on main video player.
-Reverted double tap to seek for popup and main video players.
-Improved shuffling to use recovery record.
-Changed shuffling to place current playing stream to top of queue.
-Fixed exception when removing last item on queue.
-Changed fast forward and rewind button to previous and next on background notification.
-Changed background notification to not update when screen is off and update immediately when screen is turned back on.
-Removed unused intent strings.
-Changed "Append" to "Enqueue" for append text.
-Added icons for shuffle and drag handle.
-Fixed exception when returning to background player activity after service shuts down.
-Fixed open detail only working for Youtube.
- Fixed media source resolution on background player for streams without an audio only stream.
- Fixed background player not updating when screen turns back on.
- Fixed background player notification switching to wrong repeat mode icon opacity on click.
-Added simple notification channel for Android O.
-Fixes notification building failure for background and popup player on Android O.
-Reduce notification channel importance to low to avoid making noise on every notification update.
Add search and watch history
* Make MainActicity a single task
* Remove some casting
* SearchFragment: start searching when created with query
* Handle settings change in onResume
* History: Log pop up and background playback
* History: Add swipe to remove functionallity
* Enable history by default
* Use stream item
* Store more information about the stream
* Integrate history database into AppDatabase
* Remove redundant casts
* Re-enable date converters
* History: Use Rx Java and run DB in background
* Also make HistoryDAO extend BasicDAO
* History: RX-ify swipe to remove
* Sort history entries by creation date
* History: Set toolbar title
* Don't repeat history entries
* Introduced setters so we can update entries in the database
* If the latest entry has the same (main) values, just update it
