MIDI Manager work in progress

Still to do:

Add MidiInputPort and MidiOutputPort classes
Schedule sending MIDI events in the future
Security/permissions
Reconsider interface for virtual devices
Look into performance optimizations

Change-Id: I9b7d63b196996a04be0a830efa913043da1328a8
diff --git a/Android.mk b/Android.mk
index ec0c235..2dc210f 100644
--- a/Android.mk
+++ b/Android.mk
@@ -172,6 +172,8 @@
 	core/java/android/hardware/location/IGeofenceHardwareMonitorCallback.aidl \
 	core/java/android/hardware/soundtrigger/IRecognitionStatusCallback.aidl \
 	core/java/android/hardware/usb/IUsbManager.aidl \
+	core/java/android/midi/IMidiListener.aidl \
+	core/java/android/midi/IMidiManager.aidl \
 	core/java/android/net/IConnectivityManager.aidl \
 	core/java/android/net/IEthernetManager.aidl \
 	core/java/android/net/IEthernetServiceListener.aidl \