[Provider Model] Dynamically update the Internet Panel title

- Change from "Internet" to "Airplane mode networks"

- Screenshot:
  https://screenshot.googleplex.com/gk3RBcjPsXq5NTk

Bug: 176803442
Test: manual test
- atest InternetConnectivityPanelTest
- make RunSettingsRoboTests ROBOTEST_FILTER=PanelFragmentTest

Change-Id: Ifb2c24434e480861fc7c3eaece683d49eb99013e

tests/unit/src/com/android/settings/panel/InternetConnectivityPanelTest.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2021 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.panel;
+
+import static com.android.settings.network.InternetUpdater.INTERNET_APM;
+import static com.android.settings.network.InternetUpdater.INTERNET_APM_NETWORKS;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.clearInvocations;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.settings.testutils.ResourcesUtils;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+
+@RunWith(AndroidJUnit4.class)
+public class InternetConnectivityPanelTest {
+
+    public static final String TITLE_INTERNET = ResourcesUtils.getResourcesString(
+            ApplicationProvider.getApplicationContext(), "provider_internet_settings");
+    public static final String TITLE_APM_NETWORKS = ResourcesUtils.getResourcesString(
+            ApplicationProvider.getApplicationContext(), "airplane_mode_network_panel_title");
+
+    @Rule
+    public final MockitoRule mMocks = MockitoJUnit.rule();
+    @Mock
+    PanelContentCallback mPanelContentCallback;
+
+    private Context mContext;
+    private InternetConnectivityPanel mPanel;
+
+    @Before
+    public void setUp() {
+        mContext = spy(ApplicationProvider.getApplicationContext());
+
+        mPanel = InternetConnectivityPanel.create(mContext);
+        mPanel.registerCallback(mPanelContentCallback);
+        mPanel.mIsProviderModelEnabled = true;
+    }
+
+    @Test
+    public void getTitle_internetTypeChangedFromApmToApmNetworks_verifyTitleChanged() {
+        mPanel.onInternetTypeChanged(INTERNET_APM);
+
+        assertThat(mPanel.getTitle()).isEqualTo(TITLE_INTERNET);
+
+        clearInvocations(mPanelContentCallback);
+
+        mPanel.onInternetTypeChanged(INTERNET_APM_NETWORKS);
+
+        assertThat(mPanel.getTitle()).isEqualTo(TITLE_APM_NETWORKS);
+        verify(mPanelContentCallback).onTitleChanged();
+    }
+
+    @Test
+    public void getTitle_internetTypeChangedFromApmNetworksToApm_verifyTitleChanged() {
+        mPanel.onInternetTypeChanged(INTERNET_APM_NETWORKS);
+
+        assertThat(mPanel.getTitle()).isEqualTo(TITLE_APM_NETWORKS);
+
+        clearInvocations(mPanelContentCallback);
+
+        mPanel.onInternetTypeChanged(INTERNET_APM);
+
+        assertThat(mPanel.getTitle()).isEqualTo(TITLE_INTERNET);
+        verify(mPanelContentCallback).onTitleChanged();
+    }
+}