Make MidiDeviceInfo accessible to native code

Add a native class that supports serialization via Parcel.

Bug: 25945784
Test: using a PoC app
Change-Id: I10ff8dec38e5584a8e5a4c96b1f6978f708c305e
diff --git a/media/libmedia/Android.mk b/media/libmedia/Android.mk
index e1e2405..0c4c547 100644
--- a/media/libmedia/Android.mk
+++ b/media/libmedia/Android.mk
@@ -43,6 +43,7 @@
     mediarecorder.cpp \
     IMediaMetadataRetriever.cpp \
     mediametadataretriever.cpp \
+    MidiDeviceInfo.cpp \
     MidiIoWrapper.cpp \
     ToneGenerator.cpp \
     JetPlayer.cpp \