resume
pause
PlayerStates_Prepared
入口：setDataSourceAndPlay
PlayerStates_PlaybackCompleted
Y
false
stop
PlayerStates_Playing
播放资源时设置该参数
mStartWhenPrepared（起播后处于暂停还是播放状态）
PlayerStates_Preparing
surfaceDestroyed回调
OnPreparedListener回调
SysMediaPlayer状态机
OnComplete回调
true
startAndSeek
PlayerStates_Paused
PlayerStates_Idle
SysMediaPlayer初始化
mStartWhenPrepared
PlayerStates_Destroyed
destroy
PlayerStates_Stopping
