Add remaining whitelisted controllers

Because I missed them in the long whitelist the first time...

Bug: 79779103
Test: robotests
Change-Id: I01c8c80fe306667c1d3ac007b16fad546c5a5f40

src/com/android/settings/accessibility/MagnificationGesturesPreferenceController.java

@@ -16,6 +16,8 @@ package com.android.settings.accessibility;
 import android.content.Context;
 import android.os.Bundle;
 import android.provider.Settings;
+import android.text.TextUtils;
+
 import androidx.preference.Preference;
 
 import com.android.settings.R;
@@ -61,6 +63,12 @@ public class MagnificationGesturesPreferenceController extends TogglePreferenceC
         return AVAILABLE;
     }
 
+    @Override
+    public boolean isSliceable() {
+        return TextUtils.equals(getPreferenceKey(),
+                "screen_magnification_gestures_preference_screen");
+    }
+
     @Override
     public CharSequence getSummary() {
         int resId = 0;