Implement Wi-Fi QR code scanner flow.

1. Implements WifiNetworkConfig Wi-Fi connection method
2. Shows error message when the QR code is not valid and hides it after 2s
3. In configurator mode, launchs AddDeviceFragment for a valid QR code
4. In enrollee mode, connects Wi-Fi for a valid QR code

Bug: 118794978
Test: manual test
      atest WifiQrCodetest
      atest WifiDppConfiguratorActivityTest
      atest WifiDppEnrolleeActivityTest
      atest WifiDppQrCodeScannerFragmentTest

Change-Id: Ie4731b22df295c60906156d33ea28dad9c084ce4

tests/unit/src/com/android/settings/wifi/dpp/WifiDppConfiguratorActivityTest.java

@@ -80,4 +80,20 @@ public class WifiDppConfiguratorActivityTest {
         assertThat(activity instanceof WifiDppQrCodeGeneratorFragment
                 .OnQrCodeGeneratorFragmentAddButtonClickedListener).isEqualTo(true);
     }
+
+    @Test
+    public void testActivity_shouldImplementsOnScanWifiDppSuccessCallback() {
+        WifiDppConfiguratorActivity activity = mActivityRule.getActivity();
+
+        assertThat(activity instanceof WifiDppQrCodeScannerFragment
+                .OnScanWifiDppSuccessListener).isEqualTo(true);
+    }
+
+    @Test
+    public void testActivity_shouldImplementsOnScanZxingWifiFormatSuccessCallback() {
+        WifiDppConfiguratorActivity activity = mActivityRule.getActivity();
+
+        assertThat(activity instanceof WifiDppQrCodeScannerFragment
+                .OnScanZxingWifiFormatSuccessListener).isEqualTo(true);
+    }
 }

tests/unit/src/com/android/settings/wifi/dpp/WifiDppEnrolleeActivityTest.java

@@ -0,0 +1,49 @@
+/*
+ * 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 static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.rule.ActivityTestRule;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class WifiDppEnrolleeActivityTest {
+    @Rule
+    public final ActivityTestRule<WifiDppEnrolleeActivity> mActivityRule =
+            new ActivityTestRule<>(WifiDppEnrolleeActivity.class);
+
+    @Test
+    public void testActivity_shouldImplementsOnScanWifiDppSuccessCallback() {
+        WifiDppEnrolleeActivity activity = mActivityRule.getActivity();
+
+        assertThat(activity instanceof WifiDppQrCodeScannerFragment
+                .OnScanWifiDppSuccessListener).isEqualTo(true);
+    }
+
+    @Test
+    public void testActivity_shouldImplementsOnScanZxingWifiFormatSuccessCallback() {
+        WifiDppEnrolleeActivity activity = mActivityRule.getActivity();
+
+        assertThat(activity instanceof WifiDppQrCodeScannerFragment
+                .OnScanZxingWifiFormatSuccessListener).isEqualTo(true);
+    }
+}