Remove Wi-Fi hotspot from settings search for non-admin users

- Don't use ViewModel if the settings UI is restricted

Bug: 284931681
Test: manual test
atest -c WifiTetherSettingsTest

Change-Id: I3ae23b01b3be821c3560552b39cbd83ab51b2095

src/com/android/settings/wifi/tether/WifiTetherSettings.java

@@ -91,7 +91,8 @@ public class WifiTetherSettings extends RestrictedDashboardFragment
     @VisibleForTesting
     WifiTetherAutoOffPreferenceController mWifiTetherAutoOffPreferenceController;
 
-    private boolean mUnavailable;
+    @VisibleForTesting
+    boolean mUnavailable;
     private WifiRestriction mWifiRestriction;
     @VisibleForTesting
     TetherChangeReceiver mTetherChangeReceiver;
@@ -139,6 +140,9 @@ public class WifiTetherSettings extends RestrictedDashboardFragment
 
         setIfOnlyAvailableForAdmins(true);
         mUnavailable = isUiRestricted() || !mWifiRestriction.isHotspotAvailable(getContext());
+        if (mUnavailable) {
+            return;
+        }
 
         mWifiTetherViewModel = FeatureFactory.getFactory(getContext()).getWifiFeatureProvider()
                 .getWifiTetherViewModel(this);
@@ -342,7 +346,16 @@ public class WifiTetherSettings extends RestrictedDashboardFragment
 
         @Override
         protected boolean isPageSearchEnabled(Context context) {
-            if (context == null || !WifiUtils.canShowWifiHotspot(context)) return false;
+            if (context == null) {
+                return false;
+            }
+            UserManager userManager = context.getSystemService(UserManager.class);
+            if (userManager == null || !userManager.isAdminUser()) {
+                return false;
+            }
+            if (!WifiUtils.canShowWifiHotspot(context)) {
+                return false;
+            }
             return !FeatureFlagUtils.isEnabled(context, FeatureFlags.TETHER_ALL_IN_ONE);
         }