USB audio: fix imports

import android.media.AudioSystem;

import android.media.IAudioService;

import android.media.midi.MidiDeviceInfo;

import android.os.FileObserver;

import android.os.Bundle;

import android.os.FileObserver;

import android.os.RemoteException;

import android.os.ServiceManager;

import android.os.SystemClock;

import libcore.io.IoUtils;

import java.io.File;

import java.io.FileDescriptor;

import java.io.PrintWriter;

import java.util.HashMap;

import java.util.ArrayList;

/**

 * UsbAlsaManager manages USB audio and MIDI devices.

    // Devices List

    //

/*

    //import java.util.ArrayList;

    public ArrayList<UsbAudioDevice> getConnectedDevices() {

        ArrayList<UsbAudioDevice> devices = new ArrayList<UsbAudioDevice>(mAudioDevices.size());

        for (HashMap.Entry<UsbDevice,UsbAudioDevice> entry : mAudioDevices.entrySet()) {