Make it so client code does not tie tether to wifi

The wifi service already handles turning off tethering if
multi-interface is/isn't supported. We don't need to do tie wifi
and tethering stuff together in the UI.

Test: robotests still pass
Bug: 79213401
Change-Id: I699dfe2d7646f248a54faa5a8429176697614cdf

src/com/android/settings/wifi/WifiEnabler.java

@@ -160,7 +160,7 @@ public class WifiEnabler implements SwitchWidgetController.OnSwitchChangeListene
                 setSwitchBarChecked(false);
                 mSwitchWidget.setEnabled(true);
         }
-        if (mayDisableTethering(!mSwitchWidget.isChecked())) {
+
         if (RestrictedLockUtils.hasBaseUserRestriction(mContext,
                 UserManager.DISALLOW_CONFIG_TETHERING, UserHandle.myUserId())) {
             mSwitchWidget.setEnabled(false);
@@ -170,7 +170,6 @@ public class WifiEnabler implements SwitchWidgetController.OnSwitchChangeListene
             mSwitchWidget.setDisabledByAdmin(admin);
         }
     }
-    }
 
     private void setSwitchBarChecked(boolean checked) {
         mStateMachineEvent = true;
@@ -203,15 +202,11 @@ public class WifiEnabler implements SwitchWidgetController.OnSwitchChangeListene
         // Show toast message if Wi-Fi is not allowed in airplane mode
         if (isChecked && !WirelessUtils.isRadioAllowed(mContext, Settings.Global.RADIO_WIFI)) {
             Toast.makeText(mContext, R.string.wifi_in_airplane_mode, Toast.LENGTH_SHORT).show();
-            // Reset switch to off. No infinite check/listenenr loop.
+            // Reset switch to off. No infinite check/listener loop.
             mSwitchWidget.setChecked(false);
             return false;
         }
 
-        // Disable tethering if enabling Wifi
-        if (mayDisableTethering(isChecked)) {
-            mConnectivityManager.stopTethering(ConnectivityManager.TETHERING_WIFI);
-        }
         if (isChecked) {
             mMetricsFeatureProvider.action(mContext, MetricsEvent.ACTION_WIFI_ON);
         } else {
@@ -226,10 +221,4 @@ public class WifiEnabler implements SwitchWidgetController.OnSwitchChangeListene
         }
         return true;
     }
-
-    private boolean mayDisableTethering(boolean isChecked) {
-        final int wifiApState = mWifiManager.getWifiApState();
-        return isChecked && ((wifiApState == WifiManager.WIFI_AP_STATE_ENABLING) ||
-            (wifiApState == WifiManager.WIFI_AP_STATE_ENABLED));
-    }
 }

tests/robotests/src/com/android/settings/testutils/shadow/ShadowRestrictedLockUtils.java

@@ -89,6 +89,18 @@ public class ShadowRestrictedLockUtils {
         return (sKeyguardDisabledFeatures & features) == 0 ? null : new EnforcedAdmin();
     }
 
+    @Implementation
+    public static boolean hasBaseUserRestriction(Context context,
+            String userRestriction, int userId) {
+        return sIsRestricted;
+    }
+
+    @Implementation
+    public static EnforcedAdmin checkIfRestrictionEnforced(Context context,
+            String userRestriction, int userId) {
+        return sIsRestricted ? new EnforcedAdmin() : null;
+    }
+
     public static boolean hasAdminSupportDetailsIntentLaunched() {
         return sAdminSupportDetailsIntentLaunched;
     }

tests/robotests/src/com/android/settings/wifi/WifiEnablerTest.java

@@ -16,6 +16,8 @@
 
 package com.android.settings.wifi;
 
+import static com.google.common.truth.Truth.assertThat;
+
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -25,6 +27,7 @@ import android.net.ConnectivityManager;
 import android.net.wifi.WifiManager;
 
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.ShadowRestrictedLockUtils;
 import com.android.settings.widget.SwitchWidgetController;
 import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
 
@@ -33,8 +36,10 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
 
 @RunWith(SettingsRobolectricTestRunner.class)
+@Config(shadows = ShadowRestrictedLockUtils.class)
 public class WifiEnablerTest {
 
     @Mock
@@ -59,8 +64,6 @@ public class WifiEnablerTest {
         when(mWifiManager.setWifiEnabled(true)).thenReturn(true);
         when(mWifiManager.getWifiApState()).thenReturn(WifiManager.WIFI_AP_STATE_ENABLED);
 
-        mEnabler.onSwitchToggled(true);
+        assertThat(mEnabler.onSwitchToggled(true)).isTrue();
-
-        verify(mConnectivityManager).stopTethering(ConnectivityManager.TETHERING_WIFI);
     }
 }

tests/robotests/src/com/android/settings/wifi/WifiMasterSwitchPreferenceControllerTest.java

@@ -36,6 +36,7 @@ import androidx.preference.PreferenceScreen;
 
 import com.android.settings.testutils.FakeFeatureFactory;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.ShadowRestrictedLockUtils;
 import com.android.settings.widget.MasterSwitchPreference;
 import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
 
@@ -48,6 +49,7 @@ import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
 
 @RunWith(SettingsRobolectricTestRunner.class)
+@Config(shadows = ShadowRestrictedLockUtils.class)
 public class WifiMasterSwitchPreferenceControllerTest {
 
     @Mock