[Catalyst] Tethering screen migration

- Add a flag for the migration
- Add the skeleton of the screen

Test: atest TetherScreenTest
Bug: 368359963
Flag: com.android.settings.flags.catalyst_tether_settings
Change-Id: Ib9987def4f1a644f7661e75c314b3a556e8f210c

aconfig/catalyst/network_and_internet.aconfig

@@ -22,6 +22,13 @@ flag {
   bug: "323791114"
 }
 
+flag {
+  name: "catalyst_tether_settings"
+  namespace: "android_settings"
+  description: "Flag for Hotspot & tethering"
+  bug: "323791114"
+}
+
 flag {
   name: "catalyst_adaptive_connectivity"
   namespace: "android_settings"

src/com/android/settings/network/tether/TetherScreen.kt

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2024 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.tether
+
+import android.content.Context
+import android.net.TetheringManager
+import com.android.settings.R
+import com.android.settings.flags.Flags
+import com.android.settings.network.TetherPreferenceController
+import com.android.settingslib.TetherUtil
+import com.android.settingslib.Utils
+import com.android.settingslib.metadata.PreferenceAvailabilityProvider
+import com.android.settingslib.metadata.ProvidePreferenceScreen
+import com.android.settingslib.metadata.preferenceHierarchy
+import com.android.settingslib.preference.PreferenceScreenCreator
+
+@ProvidePreferenceScreen
+class TetherScreen : PreferenceScreenCreator, PreferenceAvailabilityProvider {
+
+    override val key: String
+        get() = KEY
+
+    override val icon: Int
+        get() = R.drawable.ic_wifi_tethering
+
+    override val keywords: Int
+        get() = R.string.keywords_hotspot_tethering
+
+    override fun getPreferenceTitle(context: Context): CharSequence? =
+        if (TetherPreferenceController.isTetherConfigDisallowed(context)) {
+            context.getText(R.string.tether_settings_title_all)
+        } else {
+            val tetheringManager = context.getSystemService(TetheringManager::class.java)!!
+            context.getText(Utils.getTetheringLabel(tetheringManager))
+        }
+
+    override fun isAvailable(context: Context) = TetherUtil.isTetherAvailable(context)
+
+    override fun isFlagEnabled(context: Context) = Flags.catalystTetherSettings()
+
+    override fun hasCompleteHierarchy() = false
+
+    override fun fragmentClass() = TetherSettings::class.java
+
+    override fun getPreferenceHierarchy(context: Context) = preferenceHierarchy(this) {}
+
+    companion object {
+        const val KEY = "tether_settings"
+    }
+}

src/com/android/settings/network/tether/TetherSettings.java

@@ -48,6 +48,7 @@ import android.text.TextUtils;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.preference.Preference;
@@ -731,4 +732,9 @@ public class TetherSettings extends RestrictedDashboardFragment
         }
         updateBluetoothAndEthernetState();
     }
+
+    @Override
+    public @Nullable String getPreferenceScreenBindingKey(@NonNull Context context) {
+        return TetherScreen.KEY;
+    }
 }

tests/robotests/src/com/android/settings/network/tether/TetherScreenTest.kt

@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2024 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.tether
+
+import android.net.TetheringManager
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.android.settings.R
+import com.android.settings.flags.Flags
+import com.android.settings.testutils.shadow.ShadowConnectivityManager
+import com.android.settings.testutils.shadow.ShadowRestrictedLockUtilsInternal
+import com.android.settingslib.Utils
+import com.android.settingslib.preference.CatalystScreenTestCase
+import com.google.common.truth.Truth.assertThat
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.annotation.Config
+import org.robolectric.annotation.Implementation
+import org.robolectric.annotation.Implements
+
+@RunWith(AndroidJUnit4::class)
+@Config(shadows = [ShadowConnectivityManager::class, ShadowRestrictedLockUtilsInternal::class,
+    ShadowTetheringManager::class])
+class TetherScreenTest : CatalystScreenTestCase() {
+    override val preferenceScreenCreator = TetherScreen()
+
+    override val flagName: String
+        get() = Flags.FLAG_CATALYST_TETHER_SETTINGS
+
+    @Before
+    fun setUp() {
+        ShadowConnectivityManager.getShadow().setTetheringSupported(true)
+    }
+
+    @Test
+    fun key() {
+        assertThat(preferenceScreenCreator.key).isEqualTo(TetherScreen.KEY)
+    }
+
+    @Test
+    fun getPreferenceTitle_tetherConfigDisallowed_shouldShowAll() {
+        ShadowRestrictedLockUtilsInternal.setRestricted(true)
+
+        assertThat(preferenceScreenCreator.getPreferenceTitle(appContext)).isEqualTo(
+                appContext.getString(R.string.tether_settings_title_all))
+    }
+
+    @Test
+    fun getPreferenceTitle_tetherConfigAllowed_shouldShowTetheringLabel() {
+        ShadowRestrictedLockUtilsInternal.setRestricted(false)
+        val tm = appContext.getSystemService(TetheringManager::class.java)
+
+        assertThat(preferenceScreenCreator.getPreferenceTitle(appContext)).isEqualTo(
+                appContext.getText(Utils.getTetheringLabel(tm)))
+    }
+
+    @Test
+    fun isAvailable_tetherIsAvailable_shouldReturnTrue() {
+        ShadowRestrictedLockUtilsInternal.setRestricted(false)
+
+        assertThat(preferenceScreenCreator.isAvailable(appContext)).isTrue()
+    }
+
+    @Test
+    fun isAvailable_tetherIsUnavailable_shouldReturnFalse() {
+        ShadowRestrictedLockUtilsInternal.setRestricted(true)
+
+        assertThat(preferenceScreenCreator.isAvailable(appContext)).isFalse()
+    }
+}
+
+@Implements(TetheringManager::class)
+class ShadowTetheringManager {
+    private val emptyArray = arrayOf<String>()
+
+    @Implementation
+    fun getTetheredIfaces() = emptyArray
+
+    @Implementation
+    fun getTetherableIfaces() = emptyArray
+
+    @Implementation
+    fun getTetherableWifiRegexs() = emptyArray
+
+    @Implementation
+    fun getTetherableUsbRegexs() = emptyArray
+
+    @Implementation
+    fun getTetherableBluetoothRegexs() = emptyArray
+}