Update a comment about when setOrientationHint() should be called

Change-Id: I389089390a552ee7a86823c050048dcec0a0eb2a
diff --git a/media/java/android/media/MediaRecorder.java b/media/java/android/media/MediaRecorder.java
index c102de4..ecabae8 100644
--- a/media/java/android/media/MediaRecorder.java
+++ b/media/java/android/media/MediaRecorder.java
@@ -286,7 +286,7 @@
 
     /**
      * Sets the orientation hint for output video playback.
-     * This method should be called before start(). This method will not
+     * This method should be called before prepare(). This method will not
      * trigger the source video frame to rotate during video recording, but to
      * add a composition matrix containing the rotation angle in the output
      * video if the output format is OutputFormat.THREE_GPP or