Add ethernet interface details settings subpage

Adds a click listener to the ethernet interface row and displays a
settings subpage with interface connection status.

Flag: com.android.settings.connectivity.ethernet_settings

Test: atest SettingsRoboTests:
com.android.settings.network.NetworkProviderSettingsTest

Change-Id: Id64ce3657b47dd4ca70d425dd3d13227c8468d2c

tests/robotests/src/com/android/settings/network/ethernet/EthernetInterfaceDetailsControllerTest.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2025 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.ethernet
+
+import android.content.Context
+import android.content.ContextWrapper
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class EthernetInterfaceDetailsControllerTest {
+    private val ethernetInterfaceDetailsFragment = EthernetInterfaceDetailsFragment()
+
+    private val context: Context =
+        object : ContextWrapper(ApplicationProvider.getApplicationContext()) {}
+
+    private val ethernetInterfaceDetailsController =
+        EthernetInterfaceDetailsController(context, ethernetInterfaceDetailsFragment, "eth0")
+
+    @Test
+    fun isAvailable_ShouldReturnTrue() {
+        assertTrue(ethernetInterfaceDetailsController.isAvailable())
+    }
+
+    @Test
+    fun getPreferencKey_shouldReturnExpectedKey() {
+        assertEquals(ethernetInterfaceDetailsController.getPreferenceKey(), "ethernet_details")
+    }
+}

tests/robotests/src/com/android/settings/network/ethernet/EthernetInterfaceDetailsFragmentTest.kt

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2025 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.ethernet
+
+import android.app.settings.SettingsEnums
+import android.content.Context
+import android.content.ContextWrapper
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.android.settings.R
+import com.android.settingslib.core.AbstractPreferenceController
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class EthernetInterfaceDetailsFragmentTest {
+    private val ethernetInterfaceDetailsFragment = EthernetInterfaceDetailsFragment()
+
+    private val context: Context =
+        object : ContextWrapper(ApplicationProvider.getApplicationContext()) {}
+
+    @Test
+    fun getMetricsCategory_shouldReturnEthernetSettings() {
+        assertEquals(
+            ethernetInterfaceDetailsFragment.getMetricsCategory(),
+            SettingsEnums.ETHERNET_SETTINGS,
+        )
+    }
+
+    @Test
+    fun getPreferenceScreenId_shouldReturnExpectedResource() {
+        assertEquals(
+            ethernetInterfaceDetailsFragment.getPreferenceScreenResId(),
+            R.xml.ethernet_interface_details,
+        )
+    }
+
+    @Test
+    fun getLogTag_shouldReturnClassName() {
+        assertEquals(
+            ethernetInterfaceDetailsFragment.getLogTag(),
+            "EthernetInterfaceDetailsFragment",
+        )
+    }
+
+    @Test
+    fun createPreferenceController_shouldReturnDetailController() {
+        val preferenceController =
+            ethernetInterfaceDetailsFragment.createPreferenceControllers(context)
+        assertEquals(1, preferenceController.size)
+        assertTrue(preferenceController[0] is AbstractPreferenceController)
+    }
+}