init: support /dev/input

Test: compile
Bug: 64114943
Change-Id: I2bbf84a6e472d720f02282e10d56795b75ac62d1
diff --git a/public/init.te b/public/init.te
index 51a991b..24dfb1d 100644
--- a/public/init.te
+++ b/public/init.te
@@ -254,6 +254,7 @@
   -dm_device
   -hwbinder_device
   -hw_random_device
+  -input_device
   -keychord_device
   -kmem_device
   -kmsg_device
@@ -453,6 +454,8 @@
 # keychord configuration
 allow init self:global_capability_class_set sys_tty_config;
 allow init keychord_device:chr_file rw_file_perms;
+allow init input_device:dir r_dir_perms;
+allow init input_device:chr_file rw_file_perms;
 
 # Access device mapper for setting up dm-verity
 allow init dm_device:chr_file rw_file_perms;