-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.
- Up to 4k with 60 fps
- Not every device can play in that resolution and bitrate
- Add option to hide these high resolution greater than 1080p (2k,4k) for not clutter the menus
- Add a default resolution for the popup, wil be used when opening in popup mode from another app
- Migrate to fragments
- Fix#487
- Don't show "Open in popup mode" to channel links
- New backstack of videos
- Change the subscribers count to format using `NumberFormat`, for example some locales use `.` others `,`, this handles it automatically (and the old method had a bug for leading zero, e.g. 4.82.125 instead of 4.082.125)
- Add string 'subscribers' for channels with more than 1 subscriber (plural)
- Popup player chooses the default format and resolution based on the new preference (format)
- Fix taskaffinity of the router activities
- Show title before loading, as it is available from the items already loaded
Mauricio Colli
John Zhen M
Tonelico
Christian Schabesberger