Add access permission of dvb_device for priv_app and system_service.

Test: Manually verified with usb tuner devices and archer.

Bug: 30375009
Change-Id: Ib2790b6f4e616ba1f7b969e0a40dc38c7a1bc57a
diff --git a/sepolicy/system_service.te b/sepolicy/system_service.te
index f6783d7..0d85c35 100644
--- a/sepolicy/system_service.te
+++ b/sepolicy/system_service.te
@@ -1,3 +1,4 @@
 # Access devices.
 allow system_server dvb_device:chr_file rw_file_perms;
+allow system_server dvb_device:dir { search read open };
 allow system_server uhid_device:chr_file { write open ioctl };