SplitMotionEvents not disabling multi tou

Question

so I'm currently working on trying to disable multi touch on an activity so users can't click the on and off button at the same time. Through my research I saw that others have been able to do this by setting android:splitMotionEvents to false. Like I've done below

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:splitMotionEvents="false"
    android:layoutDirection="ltr"
    tools:context="com.gm.hmi.presentation.ttysetting.TTYSettingOverviewActivity">

However, when I run it in the emulator I'm still able to simulate multi touch. Do I need to add anything else? Or is there something I'm missing? Thank you for your help