Fix typo

Change-Id: I1947b71849694ab1fbf7a9789fb8a4bd5325ded7
diff --git a/v4/java/android/support/v4/media/session/MediaButtonReceiver.java b/v4/java/android/support/v4/media/session/MediaButtonReceiver.java
index b0c3812..d5eb0e8 100644
--- a/v4/java/android/support/v4/media/session/MediaButtonReceiver.java
+++ b/v4/java/android/support/v4/media/session/MediaButtonReceiver.java
@@ -41,7 +41,7 @@
  *   <intent-filter>
  *     <action android:name="android.intent.action.MEDIA_BUTTON" />
  *   </intent-filter>
- * </service>
+ * </receiver>
  * </pre>
  * This class assumes you have a {@link Service} in your app that controls
  * media playback via a {@link MediaSessionCompat}. That {@link Service} must