[Provider Model] Add connected ethernet network preference

- Show the preference if connected to ethernet network

- Hide the preference if not connected to ethernet network

- Screenshot:
  https://screenshot.googleplex.com/5ZkZXnTr9Hcfsyt

Bug: 176796623
Test: manual test
- atest ConnectedEthernetNetworkControllerTest
- make RunSettingsRoboTests ROBOTEST_FILTER=NetworkProviderSettingsTest

Change-Id: I0f062eb2ee4898976f5e7a1c3f2c4061b60a3126

tests/unit/src/com/android/settings/network/ConnectedEthernetNetworkControllerTest.java

@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2021 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.network;
+
+import static com.android.settings.network.InternetUpdater.INTERNET_APM;
+import static com.android.settings.network.InternetUpdater.INTERNET_APM_NETWORKS;
+import static com.android.settings.network.InternetUpdater.INTERNET_CELLULAR;
+import static com.android.settings.network.InternetUpdater.INTERNET_ETHERNET;
+import static com.android.settings.network.InternetUpdater.INTERNET_WIFI;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.wifi.WifiManager;
+import android.os.Looper;
+
+import androidx.lifecycle.Lifecycle;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceManager;
+import androidx.preference.PreferenceScreen;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+
+@RunWith(AndroidJUnit4.class)
+public class ConnectedEthernetNetworkControllerTest {
+
+    @Rule
+    public final MockitoRule mMockitoRule = MockitoJUnit.rule();
+
+    private Context mContext;
+    private ConnectedEthernetNetworkController mController;
+    private PreferenceScreen mScreen;
+    private Preference mPreference;
+
+    @Before
+    public void setUp() {
+        mContext = spy(ApplicationProvider.getApplicationContext());
+        when(mContext.getSystemService(ConnectivityManager.class)).thenReturn(
+                mock(ConnectivityManager.class));
+        when(mContext.getSystemService(Context.WIFI_SERVICE)).thenReturn(mock(WifiManager.class));
+
+        mController = new ConnectedEthernetNetworkController(mContext, mock(Lifecycle.class));
+        if (Looper.myLooper() == null) {
+            Looper.prepare();
+        }
+        final PreferenceManager preferenceManager = new PreferenceManager(mContext);
+        mScreen = preferenceManager.createPreferenceScreen(mContext);
+        mPreference = new Preference(mContext);
+        mPreference.setKey(ConnectedEthernetNetworkController.KEY);
+        mScreen.addPreference(mPreference);
+    }
+
+    @Test
+    public void isAvailable_internetApm_shouldBeFalse() {
+        mController.onInternetTypeChanged(INTERNET_APM);
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void isAvailable_internetApmNetworks_shouldBeFalse() {
+        mController.onInternetTypeChanged(INTERNET_APM_NETWORKS);
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void isAvailable_internetWifi_shouldBeFalse() {
+        mController.onInternetTypeChanged(INTERNET_WIFI);
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void isAvailable_internetCellular_shouldBeFalse() {
+        mController.onInternetTypeChanged(INTERNET_CELLULAR);
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void isAvailable_internetEthernet_shouldBeTrue() {
+        mController.onInternetTypeChanged(INTERNET_ETHERNET);
+
+        assertThat(mController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void isVisible_internetWifiToEthernet_shouldBeFalseThenTrue() {
+        mController.displayPreference(mScreen);
+        mController.onInternetTypeChanged(INTERNET_WIFI);
+
+        assertThat(mPreference.isVisible()).isFalse();
+
+        mController.onInternetTypeChanged(INTERNET_ETHERNET);
+
+        assertThat(mPreference.isVisible()).isTrue();
+    }
+
+    @Test
+    public void isVisible_internetEthernetToCellular_shouldBeTrueThenFalse() {
+        mController.displayPreference(mScreen);
+        mController.onInternetTypeChanged(INTERNET_ETHERNET);
+
+        assertThat(mPreference.isVisible()).isTrue();
+
+        mController.onInternetTypeChanged(INTERNET_CELLULAR);
+
+        assertThat(mPreference.isVisible()).isFalse();
+    }
+}