Merge "Fixd for 5490443 Native crash while exporting a video - Add new onError...

Merge "Fixd for 5490443 Native crash while exporting a video - Add new onError callback to PreviewProgressListener, which is used to indicate video editor application for the error that has occurred during priviewing. With this modification, the application must implement the onError method, and then VideoEditorPreviewTest.java is changed accordingly." into ics-mr1