front: Fix game launch from external activity (e.g. file manager app).

src/paulscode/android/mupen64plusae/GalleryActivity.java

@@ -163,7 +163,7 @@ protected void onCreate( Bundle savedInstanceState )
                     @Override
                     public void onComputeMd5Finished( File file, String md5 )
                     {
-                        ActivityHelper.startGamePrefsActivity( GalleryActivity.this, file.getAbsolutePath(), md5 );
+                        launchGameActivity( file.getAbsolutePath(), md5, false );
                     }
                 } );
                 task.execute();