linphone-android/app/src/main/res/layout/call_incoming_actions.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:bind="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <data>
        <import type="android.view.View" />
        <variable
            name="viewModel"
            type="org.linphone.ui.call.viewmodel.CurrentCallViewModel" />
    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="@dimen/call_main_actions_menu_height">

        <include
            bind:viewModel="@{viewModel}"
            android:id="@+id/unlock_screen_bottom_bar"
            layout="@layout/call_incoming_actions_screen_unlocked"
            android:layout_width="0dp"
            android:layout_height="@dimen/call_main_actions_menu_height"
            android:visibility="@{viewModel.isScreenLocked ? View.GONE : View.VISIBLE, default=gone}"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"/>

        <include
            bind:viewModel="@{viewModel}"
            android:id="@+id/locked_screen_bottom_bar"
            layout="@layout/call_incoming_actions_screen_locked"
            android:layout_width="0dp"
            android:layout_height="70dp"
            android:layout_marginBottom="20dp"
            android:layout_marginStart="20dp"
            android:layout_marginEnd="20dp"
            android:visibility="@{viewModel.isScreenLocked ? View.VISIBLE : View.GONE}"
            app:layout_constraintWidth_max="@dimen/button_max_width"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"/>

    </androidx.constraintlayout.widget.ConstraintLayout>

</layout>