Upload basic UI files for Wi-Fi DPP Settings development II.

Add 3 fragments:

  WifiDppQrCodeGeneratorFragment
  WifiDppChooseSavedWifiNetworkFragment
  WifiDppAddDeviceFragment

Bug: 118797380
     118797202
     118794978
     118796825
     118794858
Test: atest WifiDppConfiguratorActivityTest
      atest WifiDppQrCodeScannerFragmentTest
      atest atest RunSettingsRoboTests

Change-Id: I2fbc2f46f941d49b63e4ac74d92f94bf617d2b9b

src/com/android/settings/wifi/dpp/WifiDppAddDeviceFragment.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.wifi.dpp;
+
+import android.os.Bundle;
+
+import com.android.settings.R;
+
+/**
+ * After getting Wi-Fi network information and(or) QR code, this fragment config a device to connect
+ * to the Wi-Fi network.
+ */
+public class WifiDppAddDeviceFragment extends WifiDppQrCodeBaseFragment {
+    @Override
+    protected int getLayout() {
+        return R.layout.wifi_dpp_add_device_fragment;
+    }
+
+    @Override
+    public void onActivityCreated (Bundle savedInstanceState) {
+        super.onActivityCreated(savedInstanceState);
+    }
+}