Remove ffmpeg and x264. Unused and old.

Refer Change ID: Id154c08c0bcaac258e8f163d0eb7a7f1b677ee03 for discussion on this

Change-Id: I28b8a7e1d04e6ae9cb4ca3be678f130c237548ca
Merge "Remove ffmpeg and x264. Unused and old." into kk44