Clarify constructor param in SeekBarVolumizer.

Bug: 78806021
Change-Id: Ice2c087976d0c34d85ef5c5c4660553a16502ba3
diff --git a/core/java/android/preference/SeekBarVolumizer.java b/core/java/android/preference/SeekBarVolumizer.java
index ad7b103..e8daf21 100644
--- a/core/java/android/preference/SeekBarVolumizer.java
+++ b/core/java/android/preference/SeekBarVolumizer.java
@@ -104,7 +104,7 @@
 
     @UnsupportedAppUsage
     public SeekBarVolumizer(Context context, int streamType, Uri defaultUri, Callback callback) {
-        this(context, streamType, defaultUri, callback, true);
+        this(context, streamType, defaultUri, callback, true /* playSample */);
     }
 
     public SeekBarVolumizer(