audio: Enable vndbinder use from hal_audio

Allow hal audio to use vndbinder

Change-Id: I83fc8d5b873bfc4e36f44e423d5740cb5e9739ee
diff --git a/public/hal_audio.te b/public/hal_audio.te
index dd7b140..08cc1ff 100644
--- a/public/hal_audio.te
+++ b/public/hal_audio.te
@@ -18,6 +18,9 @@
 allow hal_audio dumpstate:fd use;
 allow hal_audio dumpstate:fifo_file write;
 
+# allow hal audio to use vnbinder
+vndbinder_use(hal_audio)
+
 ###
 ### neverallow rules
 ###