Merge "MIDI: Add java imports to UMP MIDI docs" into main

import android.media.midi.MidiReceiver;

import android.media.midi.MidiUmpDeviceService;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

public class MidiEchoDeviceService extends MidiUmpDeviceService {

    private static final String TAG = "MidiEchoDeviceService";

    // Other apps will write to this port.