MIDI tools may need to be updated

[philburk]

The MIDI related tools and synthesizer in:

https://github.com/googlesamples/android-MidiSynth/tree/master/Application/src/main/java/com/example/android/common/midi

may be out of date. More recent code can be found at:

https://github.com/philburk/android-midisuite/tree/master/MidiTools/src/main/java/com/mobileer/miditools