Add uhid_device to system_server

Bug: 217275682
Change-Id: I1ae74868344da290727df2474712b8b6ad2efdd7
Test: n/a
diff --git a/private/system_server.te b/private/system_server.te
index f70744d..91e0330 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -448,6 +448,7 @@
 allow system_server adbd_socket:sock_file rw_file_perms;
 allow system_server rtc_device:chr_file rw_file_perms;
 allow system_server audio_device:dir r_dir_perms;
+allow system_server uhid_device:chr_file rw_file_perms;
 
 # write access to ALSA interfaces (/dev/snd/*) needed for MIDI
 allow system_server audio_device:chr_file rw_file_perms;