public Builder rssi(int rssi) {
            this.rssi = rssi;
            this.rxBleDeviceServices = new RxBleDeviceServices(new ArrayList<BluetoothGattService>());
            return this;
        }
Set a rssi that will be reported. Calling this method is required.
mockrxandroidble/src/main/java/com/polidea/rxandroidble2/mockrxandroidble/RxBleConnectionMock.java