MidiDeviceService: Add getDeviceInfo() accessor method

so service implementations can access their own device info object.

Change-Id: I93e0c449e72d76568d7b4c9f7f7db00a846b5a33

media/java/android/media/midi/MidiDeviceService.java

@@ -55,6 +55,7 @@ abstract public class MidiDeviceService extends Service {
 
     private IMidiManager mMidiManager;
     private MidiDeviceServer mServer;
+    private MidiDeviceInfo mDeviceInfo;
 
     @Override
     public void onCreate() {
@@ -64,6 +65,11 @@ abstract public class MidiDeviceService extends Service {
         try {
             MidiDeviceInfo deviceInfo = mMidiManager.getServiceDeviceInfo(getPackageName(),
                     this.getClass().getName());
+            if (deviceInfo == null) {
+                Log.e(TAG, "Could not find MidiDeviceInfo for MidiDeviceService " + this);
+                return;
+            }
+            mDeviceInfo = deviceInfo;
             MidiReceiver[] inputPortReceivers = getInputPortReceivers();
             if (inputPortReceivers == null) {
                 inputPortReceivers = new MidiReceiver[0];
@@ -100,6 +106,14 @@ abstract public class MidiDeviceService extends Service {
         }
     }
 
+    /**
+     * returns the {@link MidiDeviceInfo} instance for this service
+     * @return our MidiDeviceInfo
+     */
+    public MidiDeviceInfo getDeviceInfo() {
+        return mDeviceInfo;
+    }
+
     @Override
     public IBinder onBind(Intent intent) {
         if (SERVICE_INTERFACE.equals(intent.getAction()) && mServer != null) {

media/java/android/media/midi/MidiPortImpl.java

@@ -16,8 +16,6 @@
 
 package android.media.midi;
 
-import java.io.Closeable;
-
 /**
  * This class contains utilities for socket communication between a
  * MidiInputPort and MidiOutputPort