Added QuickSettings management master switch
Cherry-picked and backported from KitKat branch
Improved 'disable data network type icons' feature
- previously, only default statusbar plugin was handled
- now supports and overrides behavior of any operator plugin (OPxxPlugin.apk) installed
updates
AppPickerPreference: changed format of how preference values are stored
Instead of constructing our own value from package name and class name,
take advantage of Intent.toUri() which converts intents into URI strings
which can be easily stored with persistString().
1) Simpler handling - we don't have to parse value ourselves
(Intent.parseUri() takes care of that)
2) Preparation for shortcut support - we now can store any intents
including special
ones that can be used as shortcuts
3) Old preference values will be converted to new format automatically
so users don't need to set AppPicker preferences from scratch

Cherry-picked and backported from KitKat branch