AudioManager: fix typo in java doc.

Fix typo spotted by API review.

Bug: 206628713
Test: make offline-sdk-docs
Change-Id: Ic681d1a99f7100215a40ece0203e2c15c1160680
diff --git a/media/java/android/media/AudioManager.java b/media/java/android/media/AudioManager.java
index c662223..49f1f84 100644
--- a/media/java/android/media/AudioManager.java
+++ b/media/java/android/media/AudioManager.java
@@ -3098,7 +3098,7 @@
     public static final int MODE_CALL_REDIRECT   = AudioSystem.MODE_CALL_REDIRECT;
 
     /**
-     * n audio/video chat or VoIP call is established and its audio is being redirected to another
+     * An audio/video chat or VoIP call is established and its audio is being redirected to another
      * device.
      */
     public static final int MODE_COMMUNICATION_REDIRECT = AudioSystem.MODE_COMMUNICATION_REDIRECT;