Development shortcut in StatusBar and Recent Panel

It enables the wipe data and application force close option in the
recent tasks list and in the notification area. These options will
be available only if the Development shortcut option is enabled.

Change-Id: Ia4e1d040e8eade5afe118dd62bc28c86381c03e6
change default for unknown sources & verify apps

Change-Id: I04467c0c1ef3985b416f6e58013ddc3ce4137712