[USB Audio] Fix SEPolicy issue

Error:
avc:  denied  { search } for  name="01" dev="debugfs" ino=927573 scontext=u:r:hal_audio_default:s0 tcontext=u:object_r:vendor_usb_debugfs:s0 tclass=dir permissive=0

Bug: 342060153
Test: Local Test.
Flag: EXEMPT bugfix
Change-Id: I29a73a202b239cf37dc53ccf3ef83df3b693e717
diff --git a/audio/sepolicy/common/hal_audio_default.te b/audio/sepolicy/common/hal_audio_default.te
index fac4f1a..6637951 100644
--- a/audio/sepolicy/common/hal_audio_default.te
+++ b/audio/sepolicy/common/hal_audio_default.te
@@ -14,6 +14,7 @@
 allow hal_audio_default sysfs_pixelstats:file rw_file_perms;
 allow hal_audio_default sysfs_extcon:dir search;
 allow hal_audio_default sysfs_extcon:file r_file_perms;
+allow hal_audio_default vendor_usb_debugfs:dir search;
 
 #allow access to aoc and kernel boottime
 allow hal_audio_default sysfs_aoc:dir { search };