Rewrite MIDI 1.0 USB Host mode in Java

ALSA has multiple bugs related to MIDI 1.0. This CL removes
Android's dependency on ALSA for MIDI 1.0 USB Host mode. MIDI to
USB MIDI conversion is done in UsbMidiPacketConverter.java

ALSA is still used for peripheral mode.

Bug: 217392573
Test: Ran local unit tests with UsbMidiPacketConverter
Test: MidiScope/MidiKeyboard with multiple MIDI keyboards
Change-Id: I0b86f9bd26e4c9a50576f704deb6b53fc9a5c130