* Fix typo in dropbox
Reported by @lescheck
* Rephrase text justification explanation more elegantly
* CoverBrowser: fix up some plurals
* Statistics: remove random use of template function
* Use ngettext for minute/minutes and second/seconds
* Change KB/MB/GB to kB/MB/GB SI units
- Lcd devices won't use the SurfaceView, just the good old native content/window (except AndroidTv and ChromeOS)
- All android dialogs will be presented with Material Design on recent devices.
- Added an option to device settings to manage application battery optimization.
- Permissions that require the user to go to a settings page will be presented with a native android dialog.
- bump android-luajit-launcher
- Changes under the hood: koreader/android-luajit-launcher#257
* use product as device model
* print android version (codename + number) + api at launch
* exit the application properly
* fix fullscreen switching (and disable it on newer android versions)
* gettext: lower log level for message: cannot open translation file
* android common settings refactor
