Update the exception description for start(). am: ac06177a13

am: 8b137cc06b

Change-Id: Id448ab164e1fd0d3f5977c30c5395bcb6e87f90f

media/java/android/media/MediaRecorder.java

@@ -859,7 +859,7 @@ public class MediaRecorder
      * not start another recording session during recording.
      *
      * @throws IllegalStateException if it is called before
-     * prepare().
+     * prepare() or when the camera is already in use by another app.
      */
     public native void start() throws IllegalStateException;