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

* commit '0a45cda68209717767412d040c24e8253c1b5847':
  stagefright: add SoftAVCEnc using libavc
  stagefright: add SoftAVCDec using libavc
  stagefright: add SoftMPEG2 decoder using libmpeg2