Add some system packages to package list adapter.

As we're using the adapter for notification control stuff, we need to
include those packages, too, as they're throwing notifications as well.

Also optimize code a little.

Change-Id: I8829041a535923e3d93d9566e27eb99c48f25abd
[2/2] Profile: Remove screen lock mode
[2/2] Profile: Screen timeout
[2/2] Battery light: Add 100% charged level
[2/2] Buttons: Switch to last app
[2/2] Global actions: Mobile data
[2/2] Global actions: Wifi
[2/2] Quick pulldown: center
[2/2] Smart pulldown
[2/2] Volume panel timeout
[2/2] NavBar: Enable with s-pen
[2/2] Low battery warning policy
[2/2] Recent apps: Clear all button: Location
[2/2] Recent apps: RAM bar
[2/2] Network traffic indicator
[2/2] Floating window
[2/2] Lockscreen notifications
[2/2] Hover