Integrate ExoPlayer

[Bao Le]

Exo Player is better than native one

https://github.com/google/ExoPlayer

[Le Huynh Tuan]

According this document https://google.github.io/ExoPlayer/supported-formats.html I use ExoPlayer for wav, mp3, mp4, flac

Old player for other formats. *Note: ExoPlayer can support AAC but it's not seekable so i use old player for playing AAC