Filter out non-MIDI devices before attempting connection.

Look for non-BLE transport devices
Look for Service UUIDs indicative of non-MIDI devices

Bug: 222388547
Bug: 216498842
Bug: 221079216

Test: Connect BT headset, examine log for no MIDI connect
  Conect BLE-MIDI devices, examine log for MIDI connect
  Listen in headphones, Play a MIDI synth with BLE-MIDI controller.
  Signature:
    MidiManager: openBluetoothDevice() XX:XX:XX:XX:XX:XX
    MidiService: openBluetoothDevice()

Change-Id: Ibaadc26edb1ea9fdfab7891eda1f260fefb9757e