MIDI tools may need to be updated

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may be out of date.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

Compare the MIDI-related files under Application/src/main/java/com/example/android/common/midi with the newer sources under MidiTools/src/main/java/com/mobileer/miditools. First identify which tools and synthesizer code differ, then determine the required updates and verify that the Android media sample still builds and its MIDI functionality works with the newer code.

Written by the indexing model from the issue text.