Add flag to control Internet preference

This CL adds a flag named config_show_internet_settings so access to
Internet preference can be easily customized as Wi-fi preference was in
the past, this level of customization was lost when Internet preference
was introduced here ag/13053253.

Bug: 271203982
Test: make -j32 Settings
Test: atest -c InternetPreferenceControllerTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:0af54a1d3cfa26ba5f23b5d8c74ade2bb582f76f)
Merged-In: Iaf9a18f9389be089304d11bd3206d6917ab85124

Change-Id: Iaf9a18f9389be089304d11bd3206d6917ab85124

res/values/config.xml

@@ -387,6 +387,9 @@
     <!-- Whether Wi-Fi hotspot speed should be shown or not. -->
     <bool name="config_show_wifi_hotspot_speed">true</bool>
 
+    <!-- Whether or not Internet preference should be shown. -->
+    <bool name="config_show_internet_settings">true</bool>
+
     <!-- Whether toggle_airplane is available or not. -->
     <bool name="config_show_toggle_airplane">true</bool>
 

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

@@ -180,7 +180,7 @@ public class InternetPreferenceController extends AbstractPreferenceController i
 
     @Override
     public boolean isAvailable() {
-        return true;
+        return mContext.getResources().getBoolean(R.bool.config_show_internet_settings);
     }
 
     @Override

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

@@ -295,6 +295,12 @@ public class NetworkProviderSettings extends RestrictedSettingsFragment
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
+        final Context context = getContext();
+        if (context != null && !context.getResources().getBoolean(
+                R.bool.config_show_internet_settings)) {
+            finish();
+            return;
+        }
         mAirplaneModeEnabler = new AirplaneModeEnabler(getContext(), this);
 
         // TODO(b/37429702): Add animations and preference comparator back after initial screen is

tests/unit/src/com/android/settings/network/InternetPreferenceControllerTest.java

@@ -49,6 +49,7 @@ import androidx.test.annotation.UiThreadTest;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 
+import com.android.settings.R;
 import com.android.settings.testutils.ResourcesUtils;
 import com.android.settings.wifi.WifiPickerTrackerHelper;
 import com.android.settings.wifi.WifiSummaryUpdater;
@@ -188,8 +189,9 @@ public class InternetPreferenceControllerTest {
     }
 
     @Test
-    public void isAvailable_shouldBeTrue() {
-        assertThat(mController.isAvailable()).isTrue();
+    public void isAvailable_shouldMatchPrefFlag() {
+        assertThat(mController.isAvailable()).isEqualTo(
+                mContext.getResources().getBoolean(R.bool.config_show_internet_settings));
     }
 
     @Test