Remove duplicate layout mobile_network_settings_container_v2

- MobileNetworkActivity can use settings_base_layout.xml as layout.
- MobileNetworkActivity need to use Theme.Settings.Home because
it requests Window.FEATURE_NO_TITLE. Otherwise MobileNetworkActivity
will show title defined in xml first then change to new title.

Fixes: 123794771
Test: rebuild, manual
Change-Id: I39ae25b6d335437ffddb2f1562e7a0347db97108

res/layout/mobile_network_settings_container_v2.xml

@@ -1,39 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  Copyright (C) 2019 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.
-  -->
-
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical">
-
-    <Toolbar
-        android:id="@+id/mobile_action_bar"
-        style="?android:attr/actionBarStyle"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:navigationContentDescription="@*android:string/action_bar_up_description"
-        android:theme="?android:attr/actionBarTheme"/>
-
-    <FrameLayout
-        android:id="@+id/main_content"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_weight="1"/>
-
-</LinearLayout>

src/com/android/settings/network/NetworkDashboardFragment.java

@@ -56,7 +56,7 @@ public class NetworkDashboardFragment extends DashboardFragment implements
 
     @Override
     protected int getPreferenceScreenResId() {
-        return R.xml.network_and_internet_v2;
+        return R.xml.network_and_internet;
     }
 
     @Override
@@ -141,7 +141,7 @@ public class NetworkDashboardFragment extends DashboardFragment implements
     }
 
     public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
-            new BaseSearchIndexProvider(R.xml.network_and_internet_v2) {
+            new BaseSearchIndexProvider(R.xml.network_and_internet) {
 
                 @Override
                 public List<AbstractPreferenceController> createPreferenceControllers(Context

src/com/android/settings/network/telephony/MobileNetworkActivity.java

@@ -22,6 +22,8 @@ import android.os.Bundle;
 import android.os.UserManager;
 import android.provider.Settings;
 import android.telephony.SubscriptionInfo;
+import android.view.View;
+import android.widget.Toolbar;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.VisibleForTesting;
@@ -74,8 +76,14 @@ public class MobileNetworkActivity extends SettingsBaseActivity
             return;
         }
 
-        setContentView(R.layout.mobile_network_settings_container_v2);
+        final Toolbar toolbar = findViewById(R.id.action_bar);
-        setActionBar(findViewById(R.id.mobile_action_bar));
+        toolbar.setVisibility(View.VISIBLE);
+        setActionBar(toolbar);
+
+        final ActionBar actionBar = getActionBar();
+        if (actionBar != null) {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+        }
 
         mProxySubscriptionMgr = ProxySubscriptionManager.getInstance(this);
         mProxySubscriptionMgr.setLifecycle(getLifecycle());
@@ -85,11 +93,6 @@ public class MobileNetworkActivity extends SettingsBaseActivity
                 ? savedInstanceState.getInt(Settings.EXTRA_SUB_ID, SUB_ID_NULL)
                 : SUB_ID_NULL;
 
-        final ActionBar actionBar = getActionBar();
-        if (actionBar != null) {
-            actionBar.setDisplayHomeAsUpEnabled(true);
-        }
-
         final SubscriptionInfo subscription = getSubscription();
         updateTitleAndNavigation(subscription);
     }
@@ -178,7 +181,7 @@ public class MobileNetworkActivity extends SettingsBaseActivity
 
         final Fragment fragment = new MobileNetworkSettings();
         fragment.setArguments(bundle);
-        fragmentTransaction.replace(R.id.main_content, fragment, buildFragmentTag(subId));
+        fragmentTransaction.replace(R.id.content_frame, fragment, buildFragmentTag(subId));
         fragmentTransaction.commit();
     }
 

src/com/android/settings/network/telephony/MobileNetworkSettings.java

@@ -195,7 +195,7 @@ public class MobileNetworkSettings extends RestrictedDashboardFragment {
 
     @Override
     protected int getPreferenceScreenResId() {
-        return R.xml.mobile_network_settings_v2;
+        return R.xml.mobile_network_settings;
     }
 
     @Override
@@ -259,7 +259,7 @@ public class MobileNetworkSettings extends RestrictedDashboardFragment {
     }
 
     public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
-            new BaseSearchIndexProvider(R.xml.mobile_network_settings_v2) {
+            new BaseSearchIndexProvider(R.xml.mobile_network_settings) {
 
                 /** suppress full page if user is not admin */
                 @Override