For some reason, we fail to generate thumbnails after 15 QPR1 using the hardware OMX decoders. Remove the limits of the software codecs to make the thumbnails work again, although this might cause performance issues and possibly broken tests. Until we have a better solution, we have to live with this. Change-Id: I6ce3a99db72753972d4f1323371dac9b5f08bf6b