manta: ueventd: Give audio access to video16 to read EDID audio info

Bug: 7157451
Change-Id: I97cd61b90ca705a20d6333e024adb81a618ec9e5
diff --git a/ueventd.manta.rc b/ueventd.manta.rc
index 0b6974e..f60b330 100755
--- a/ueventd.manta.rc
+++ b/ueventd.manta.rc
@@ -80,7 +80,7 @@
 /dev/media2               0660   media      media
 
 # mixer
-/dev/video16              0660   system     system
+/dev/video16              0660   system     audio
 /dev/video17              0660   system     system
 /dev/video18              0660   system     system
 /dev/video19              0660   system     system