* Add a new activity DeviceSpecificActivity which acts as a jumppad
into an activity using "org.lineageos.settings.device.SUW_SETTINGS"
* Handles navigation (back / next)
* Handles cases where the script contains the page but SUW_SETTINGS
don't exist
* In order to use this, devices need to provide an activity that:
* at least shows a back and continue button
* returns Activity.RESULT_OK and Activity.RESULT_CANCELLED for the
buttons
* does whatever you need to specifically have done in setup!
Change-Id: I4956c8f5f1ad13b9adf2e5604fd4a728e261336b
