Extend access to proc/asound/*

Renamed this type:
proc_asound_cards -> proc_asound

Labeled /proc/asound/devices as proc_asound.

We now use proc_asound type to label files under /proc/asound which we
want to expose to system components.

Bug: 66988327
Test: Pixel 2 boots, can play sound with or without headphones, and
selinux denials to proc_asound are not seen.

Change-Id: I453d9bfdd70eb80931ec9e80f17c8fd0629db3d0
diff --git a/public/hal_audio.te b/public/hal_audio.te
index be7e235..6a436bd 100644
--- a/public/hal_audio.te
+++ b/public/hal_audio.te
@@ -14,7 +14,7 @@
 ')
 
 r_dir_file(hal_audio, proc)
-r_dir_file(hal_audio, proc_asound_cards)
+r_dir_file(hal_audio, proc_asound)
 allow hal_audio audio_device:dir r_dir_perms;
 allow hal_audio audio_device:chr_file rw_file_perms;