Add msm-fb-refresher package and initfs config

For #584 (closed).

This is meant to be a starting point, I anticipate that I may have done more than one controversial thing below. My main motivation was to try and prevent any merging headaches with the OSK PR 😃

In order to have msm-fb-refresher to run on boot in initramfs, set deviceinfo_msm_refresher="true" in the device deviceinfo file.

Note: I tested that packaging is successful, but didn't test this on my device because I don't have a device that is affected by the problem this is trying to solve, and I don't want to risk my device!