navigator.mediaDevices.getUserMedia not work on android
这两个都需要授权，h5页面的 navigator.mediaDevices.getUserMedia 才能调起录音功能
android.permission.RECORD_AUDIO
允许程序录制音频(Allows an application to record audio)
android.permission.MODIFY_AUDIO_SETTINGS
允许程序修改全局音频设置(Allows an application to modify global audio settings)