audio: add /dev/acd-audio_dcdoff_ref for audio effect visualizer

Set /dev/acd-audio_dcdoff_ref as 0660 system audio
crw-rw---- 1 system audio u:object_r:aoc_device:s0  500,  29 2021-03-18 22:19 /dev/acd-audio_dcdoff_ref

Bug: 180984363
Bug: 165719427
Test: make -j128
Test: ls -alZ /dev/acd-audio_dcdoff_ref
Change-Id: I4720349eccd5e3b797ff8e964329fe6352d5bba0
diff --git a/conf/ueventd.gs101.rc b/conf/ueventd.gs101.rc
index f85b24b..e7b259c 100644
--- a/conf/ueventd.gs101.rc
+++ b/conf/ueventd.gs101.rc
@@ -93,6 +93,7 @@
 /dev/acd-model_data             0660   system     audio
 /dev/acd-debug                  0660   system     audio
 /dev/acd-audio_tap*             0660   system     audio
+/dev/acd-audio_dcdoff_ref       0660   system     audio
 
 # Secure MEM driver
 /dev/s5p-smem             0660   drm        drmrpc