IMediaplayer.cpp
参数：KEY_PARAMETER_AUDIO_ATTRIBUTES
MediaPlayerService::Client
setAudioAttributes()
android_media_MediaPlayer.java
setParameter()
audio_attributes_to_stream_type()
updateAppOpsPlayAudio_sync()
setVolumeAuxEffectSendLevel()
baseUpdateAudioAttribute()
setAudioAttributes
AppOpsService.java
参数：OP_PLAY_AUDIO
MediaPlayerService::AudioOutput
checkAudioOperation()
Mediaplayer.cpp
unmarshallAudioAttributes()
AudioPolicyHelper.h
setAudioAttributes_l()
getMediaPlayer()
setVolume()
MediaPlayer
android_media_MediaPlayer_setVolumeAuxEffectSendLevel()
PlayerBase.java
MediaplayerService.cpp
audio_stream_type_t
android_media_MediaPlayer_setVolume()
MediaPlayer.java
