Merge "USB MIDI: Add null check on device removal" into tm-dev

                // MIDI

                ArrayList<UsbDirectMidiDevice> midiDevices =

                        mMidiDevices.remove(deviceAddress);

                if (midiDevices != null) {

                    for (UsbDirectMidiDevice midiDevice : midiDevices) {

                        if (midiDevice != null) {

                        Slog.i(TAG, "USB MIDI Device Removed: " + deviceAddress);

                            IoUtils.closeQuietly(midiDevice);

                        }

                    }

                    Slog.i(TAG, "USB MIDI Devices Removed: " + deviceAddress);

                }

                getCurrentUserSettings().usbDeviceRemoved(device);

                ConnectionRecord current = mConnected.get(deviceAddress);