Fix ViLTE is not available when WiFi Calling is disabled

Bug: 141831293
Test: 1. Set carrier config carrier_wfc_ims_available_bool to false,
then verify Wi-Fi calling option is not shown.
      2. Set carrier config carrier_vt_available_bool to false, then
      verify video calling option is not shown.
      3. Set both carrier_wfc_ims_available_bool and
      carrier_vt_available_bool to false, then verify calling category
      is not shown.

Change-Id: Ibec13fbeb5acf1d62342286687b2ba969beb4e14
Merged-In: Ibec13fbeb5acf1d62342286687b2ba969beb4e14

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

@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+package com.android.settings.network.telephony;
+
+import android.content.Context;
+
+import com.android.settings.widget.PreferenceCategoryController;
+
+/**
+ * Preference controller for "Calling" category
+ */
+public class CallingPreferenceCategoryController extends PreferenceCategoryController {
+
+    public CallingPreferenceCategoryController(Context context, String key) {
+        super(context, key);
+    }
+}

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

@@ -155,7 +155,8 @@ public class MobileNetworkSettings extends RestrictedDashboardFragment {
         if (!FeatureFlagPersistent.isEnabled(getContext(), FeatureFlags.NETWORK_INTERNET_V2)) {
             use(EuiccPreferenceController.class).init(mSubId);
         }
-        use(WifiCallingPreferenceController.class).init(mSubId);
+        final WifiCallingPreferenceController wifiCallingPreferenceController =
+                use(WifiCallingPreferenceController.class).init(mSubId);
 
         final OpenNetworkSelectPagePreferenceController openNetworkSelectPagePreferenceController =
                 use(OpenNetworkSelectPagePreferenceController.class).init(mSubId);
@@ -173,6 +174,8 @@ public class MobileNetworkSettings extends RestrictedDashboardFragment {
 
         final VideoCallingPreferenceController videoCallingPreferenceController =
                 use(VideoCallingPreferenceController.class).init(mSubId);
+        use(CallingPreferenceCategoryController.class).setChildren(
+                Arrays.asList(wifiCallingPreferenceController, videoCallingPreferenceController));
         use(Enhanced4gLtePreferenceController.class).init(mSubId)
                 .addListener(videoCallingPreferenceController);
     }

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

@@ -63,7 +63,6 @@ public class VideoCallingPreferenceController extends TelephonyTogglePreferenceC
     @Override
     public int getAvailabilityStatus(int subId) {
         return subId != SubscriptionManager.INVALID_SUBSCRIPTION_ID
-                && MobileNetworkUtils.isWifiCallingEnabled(mContext, subId)
                 && isVideoCallEnabled(subId)
                 ? AVAILABLE
                 : CONDITIONALLY_UNAVAILABLE;

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

@@ -49,9 +49,6 @@ import java.util.List;
 public class WifiCallingPreferenceController extends TelephonyBasePreferenceController implements
         LifecycleObserver, OnStart, OnStop {
 
-    @VisibleForTesting
-    static final String KEY_PREFERENCE_CATEGORY = "calling_category";
-
     private TelephonyManager mTelephonyManager;
     @VisibleForTesting
     CarrierConfigManager mCarrierConfigManager;
@@ -95,13 +92,6 @@ public class WifiCallingPreferenceController extends TelephonyBasePreferenceCont
         if (intent != null) {
             intent.putExtra(Settings.EXTRA_SUB_ID, mSubId);
         }
-        if (!isAvailable()) {
-            // Set category as invisible
-            final Preference preferenceCateogry = screen.findPreference(KEY_PREFERENCE_CATEGORY);
-            if (preferenceCateogry != null) {
-                preferenceCateogry.setVisible(false);
-            }
-        }
     }
 
     @Override
@@ -158,12 +148,14 @@ public class WifiCallingPreferenceController extends TelephonyBasePreferenceCont
                 mTelephonyManager.getCallState(mSubId) == TelephonyManager.CALL_STATE_IDLE);
     }
 
-    public void init(int subId) {
+    public WifiCallingPreferenceController init(int subId) {
         mSubId = subId;
         mTelephonyManager = TelephonyManager.from(mContext).createForSubscriptionId(mSubId);
         mImsManager = ImsManager.getInstance(mContext, SubscriptionManager.getPhoneId(mSubId));
         mSimCallManager = mContext.getSystemService(TelecomManager.class)
                 .getSimCallManagerForSubscription(mSubId);
+
+        return this;
     }
 
     private class PhoneCallStateListener extends PhoneStateListener {