Merge "Add missing include"
diff --git a/core/java/android/preference/VolumePreference.java b/core/java/android/preference/VolumePreference.java
index 970d520..0219fe8 100644
--- a/core/java/android/preference/VolumePreference.java
+++ b/core/java/android/preference/VolumePreference.java
@@ -109,7 +109,9 @@
     }
 
     public void onActivityStop() {
-        cleanup();
+        if (mSeekBarVolumizer != null) {
+            mSeekBarVolumizer.stopSample();
+        }
     }
 
     /**