Fix the UI in the left side & right side inconsistent problem

- Let the homepage show "Network & Internet" item in demo mode on large screen device.

Fixes: 276157240
Test: atest TopLevelNetworkEntryPreferenceControllerTest
Change-Id: Ife8bce28e6bc47caf3f06b1027579ea0e52172a3
diff --git a/src/com/android/settings/network/TopLevelNetworkEntryPreferenceController.java b/src/com/android/settings/network/TopLevelNetworkEntryPreferenceController.java
index 868c79e..a5c19ad 100644
--- a/src/com/android/settings/network/TopLevelNetworkEntryPreferenceController.java
+++ b/src/com/android/settings/network/TopLevelNetworkEntryPreferenceController.java
@@ -21,6 +21,7 @@
 
 import com.android.settings.R;
 import com.android.settings.Utils;
+import com.android.settings.activityembedding.ActivityEmbeddingUtils;
 import com.android.settings.core.BasePreferenceController;
 
 public class TopLevelNetworkEntryPreferenceController extends BasePreferenceController {
@@ -34,7 +35,11 @@
 
     @Override
     public int getAvailabilityStatus() {
-        return Utils.isDemoUser(mContext) ? UNSUPPORTED_ON_DEVICE : AVAILABLE;
+        // TODO(b/281597506): Update the ActivityEmbeddingUtils.isEmbeddingActivityEnabled
+        //   while getting the new API.
+        return (Utils.isDemoUser(mContext)
+            && !ActivityEmbeddingUtils.isEmbeddingActivityEnabled(mContext))
+                ? UNSUPPORTED_ON_DEVICE : AVAILABLE;
     }
 
     @Override
diff --git a/tests/robotests/src/com/android/settings/network/TopLevelNetworkEntryPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/network/TopLevelNetworkEntryPreferenceControllerTest.java
index a2bac85..43b961c 100644
--- a/tests/robotests/src/com/android/settings/network/TopLevelNetworkEntryPreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/network/TopLevelNetworkEntryPreferenceControllerTest.java
@@ -25,6 +25,7 @@
 import android.content.Context;
 import android.os.UserManager;
 import android.text.BidiFormatter;
+import android.util.FeatureFlagUtils;
 
 import com.android.settings.R;
 import com.android.settings.testutils.shadow.ShadowRestrictedLockUtilsInternal;
@@ -73,8 +74,9 @@
     }
 
     @Test
-    public void getAvailabilityStatus_demoUser_unsupported() {
+    public void getAvailabilityStatus_demoUser_nonLargeScreen_unsupported() {
         ShadowUtils.setIsDemoUser(true);
+        FeatureFlagUtils.setEnabled(mContext, "settings_support_large_screen", false);
         assertThat(mController.getAvailabilityStatus()).isEqualTo(UNSUPPORTED_ON_DEVICE);
     }