[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

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;
+    }
 }