DO NOT MERGE - fix: memory leak

free momory for str_parms to prevent memory leak.

cherry-pcik from aosp c357157e28dc0ffd069b80aeba9bf8b9eed72c9a

Bug: 18798194.

Change-Id: I7df5567d665554dbd4646c881f0f48b0c568c5fe
diff --git a/modules/usbaudio/audio_hw.c b/modules/usbaudio/audio_hw.c
index 0346408..0ee44c5 100644
--- a/modules/usbaudio/audio_hw.c
+++ b/modules/usbaudio/audio_hw.c
@@ -1026,6 +1026,8 @@
         }
     }
 
+    str_parms_destroy(parms);
+
     return 0;
 }