Add unofficial intent for WifiTetherSettings

This CL adds an intent that can be used to start
WifiTether Settings.

Test: SettingsGatewayTest still passes
Bug: 110235497
Bug: 80251951
Change-Id: Iac94e563a91b1f821f69f18234d8176350ae5f29
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index 0ad964b..cd5a908 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -32,6 +32,7 @@
     public static class BluetoothSettingsActivity extends SettingsActivity { /* empty */ }
     public static class SimSettingsActivity extends SettingsActivity { /* empty */ }
     public static class TetherSettingsActivity extends SettingsActivity { /* empty */ }
+    public static class WifiTetherSettingsActivity extends SettingsActivity { /* empty */ }
     public static class VpnSettingsActivity extends SettingsActivity { /* empty */ }
     public static class DateTimeSettingsActivity extends SettingsActivity { /* empty */ }
     public static class PrivateVolumeForgetActivity extends SettingsActivity { /* empty */ }
diff --git a/src/com/android/settings/core/gateway/SettingsGateway.java b/src/com/android/settings/core/gateway/SettingsGateway.java
index a8cb61c..8f5d992 100644
--- a/src/com/android/settings/core/gateway/SettingsGateway.java
+++ b/src/com/android/settings/core/gateway/SettingsGateway.java
@@ -136,6 +136,7 @@
 import com.android.settings.wifi.WifiSettings;
 import com.android.settings.wifi.calling.WifiCallingSettings;
 import com.android.settings.wifi.p2p.WifiP2pSettings;
+import com.android.settings.wifi.tether.WifiTetherSettings;
 
 public class SettingsGateway {
 
@@ -151,6 +152,7 @@
             SimSettings.class.getName(),
             TetherSettings.class.getName(),
             WifiP2pSettings.class.getName(),
+            WifiTetherSettings.class.getName(),
             BackgroundCheckSummary.class.getName(),
             VpnSettings.class.getName(),
             DateTimeSettings.class.getName(),