cf: add missing labels for /dev/* files

Label /dev/input_events and /dev/socket_forward as input_events_device
and socket_forward_device respectively. And add appropriate permission
to domains using these /dev nodes.

Bug: 28053261
Test: boot cuttlefish without denials to /dev/* nodes
Change-Id: Ia05b890dd8fe126db74945bd300537d4c58edc5f
5 files changed