Merge "MidiService: clear status when device unbound" into sc-v2-dev

                IBinder binder = server.asBinder();

                mDevicesByServer.remove(binder);

                // Clearing mDeviceStatus is needed because setDeviceStatus()

                // relies on finding the device in mDevicesByServer.

                // So the status can no longer be updated after we remove it.

                // Then we can end up with input ports that are stuck open.

                mDeviceStatus = null;

                try {

                    server.closeDevice();