jflteatt: Update init to I337UCUFNB1 (4.4.2)

This also aligns the ro.product.model with stock.

Change-Id: Ib783eaa3a4bc052704efeae99e0bc45fbc2aa1ab
Revert "init: enable auto-loki for att and vzw variants"

* not ready yet, causes loki to be run on devices that don't need it
* will unrevert when this is merged:
  http://review.cyanogenmod.org/#/c/59620/

This reverts commit 472729138ddf1bb5f97dafaf1b270cb158841801.

Change-Id: Ia1129774196a412ae1e7d589a091dba7443e41bb
add overlay for hardware keys