Fix double search icon in wifi calling page

- Moved fragments into wifi sub-package.
- Cleaned up inheritance for WifiCallingSettings
- Attach help and search action menu controller correctly.

Change-Id: I0bc8ab99df5d8c5ea64fb64de5ae70c2c9bd6f31
Fixes: 72958674
Test: robotest

src/com/android/settings/support/actionbar/HelpMenuController.java

@@ -27,6 +27,7 @@ import android.view.MenuInflater;
 
 import com.android.settingslib.HelpUtils;
 import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.ObservableFragment;
 import com.android.settingslib.core.lifecycle.ObservablePreferenceFragment;
 import com.android.settingslib.core.lifecycle.events.OnCreateOptionsMenu;
 
@@ -41,6 +42,10 @@ public class HelpMenuController implements LifecycleObserver, OnCreateOptionsMen
         host.getLifecycle().addObserver(new HelpMenuController(host));
     }
 
+    public static void init(@NonNull ObservableFragment host) {
+        host.getLifecycle().addObserver(new HelpMenuController(host));
+    }
+
     private HelpMenuController(@NonNull Fragment host) {
         mHost = host;
     }