Remove wifi calling from Wifi settings

Also remove the preference controller since it is only used in
ConfigureWifiSettings. The mobile network page lives in
com.android.phone and it has its own way to handle the wifi calling.

Bug: 70798448
Test: RunSettingsRoboTests
Change-Id: I0ea923c0a1ba2b89fcf8939d70128e3f54c75558

tests/robotests/src/com/android/settings/network/WifiCallingPreferenceControllerTest.java

@@ -1,105 +0,0 @@
-/*
- * Copyright (C) 2017 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;
-
-import static com.google.common.truth.Truth.assertThat;
-
-import static org.mockito.Matchers.anyInt;
-import static org.mockito.Mockito.verify;
-
-import android.content.Context;
-import android.support.v7.preference.Preference;
-
-import com.android.ims.ImsManager;
-import com.android.settings.TestConfig;
-import com.android.settings.network.WifiCallingPreferenceControllerTest.ShadowImsManager;
-import com.android.settings.testutils.SettingsRobolectricTestRunner;
-
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
-import org.robolectric.RuntimeEnvironment;
-import org.robolectric.annotation.Config;
-import org.robolectric.annotation.Implementation;
-import org.robolectric.annotation.Implements;
-
-@RunWith(SettingsRobolectricTestRunner.class)
-@Config(manifest = TestConfig.MANIFEST_PATH,
-        sdk = TestConfig.SDK_VERSION,
-        shadows = {ShadowImsManager.class})
-public class WifiCallingPreferenceControllerTest {
-
-    @Mock
-    private Preference mPreference;
-
-    private Context mContext;
-    private WifiCallingPreferenceController mController;
-
-    @Before
-    public void setUp() {
-        mContext = RuntimeEnvironment.application;
-        MockitoAnnotations.initMocks(this);
-
-        mController = new WifiCallingPreferenceController(mContext);
-    }
-
-    @After
-    public void teardown() {
-        ShadowImsManager.reset();
-    }
-
-    @Test
-    public void isAvailable_platformEnabledAndProvisioned_shouldReturnTrue() {
-        ShadowImsManager.wfcProvisioned = true;
-        ShadowImsManager.wfcEnabledByPlatform = true;
-
-        assertThat(mController.isAvailable()).isTrue();
-    }
-
-    @Test
-    public void updateState_shouldUpdatePreferenceSummary() {
-        mController.updateState(mPreference);
-
-        verify(mPreference).setSummary(anyInt());
-    }
-
-    @Implements(ImsManager.class)
-    public static class ShadowImsManager {
-
-        public static boolean wfcEnabledByPlatform;
-        public static boolean wfcProvisioned;
-
-        public static void reset() {
-            wfcEnabledByPlatform = false;
-            wfcProvisioned = false;
-        }
-
-        @Implementation
-        public static boolean isWfcEnabledByPlatform(Context context) {
-            return wfcEnabledByPlatform;
-        }
-
-        @Implementation
-        public static boolean isWfcProvisionedOnDevice(Context context) {
-            return wfcProvisioned;
-        }
-    }
-
-}