am 655084f9: am e7a53499: am 0a45cda6: am 187b196e: Merge changes Ic51e92e9,Ie808aa82,I74f5f4a1

* commit '655084f979b3067cb5a6fd2d4de148b411fbec23':
  stagefright: add SoftAVCEnc using libavc
  stagefright: add SoftAVCDec using libavc
  stagefright: add SoftMPEG2 decoder using libmpeg2