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

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

    <data>

        <import type="android.view.View" />

        <variable
            name="conferenceViewModel"
            type="org.linphone.activities.voip.viewmodels.ConferenceViewModel" />

        <variable
            name="controlsViewModel"
            type="org.linphone.activities.voip.viewmodels.ControlsViewModel" />

        <variable
            name="inflatedVisibility"
            type="Integer" />
    </data>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="@{controlsViewModel.fullScreenMode || controlsViewModel.pipMode ? @dimen/voip_remote_margin_full_screen : @dimen/voip_remote_margin, default=@dimen/voip_remote_margin}"
        android:visibility="@{inflatedVisibility}"
        android:gravity="center"
        android:orientation="vertical">

        <include
            android:id="@+id/header"
            layout="@layout/voip_conference_header"
            android:visibility="@{controlsViewModel.fullScreenMode || controlsViewModel.pipMode ? View.GONE : View.VISIBLE}"
            app:conferenceViewModel="@{conferenceViewModel}" />

        <include
            android:id="@+id/remote_recording"
            layout="@layout/voip_remote_recording"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:visibility="@{conferenceViewModel.isRemotelyRecorded ? View.VISIBLE : View.GONE, default=gone}" />

        <org.linphone.activities.voip.views.GridBoxLayout
            centerContent="@{true}"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginTop="10dp"
            android:onClick="@{() -> controlsViewModel.toggleFullScreen()}"
            app:entries="@{conferenceViewModel.conferenceParticipantDevices}"
            app:layout="@{@layout/voip_conference_participant_remote_grid}" />

    </LinearLayout>

</layout>