session-android/res/layout/emoji_display_item.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="2dp"
    android:background="?selectableItemBackground">

    <ImageView
        android:id="@+id/emoji_image"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:paddingTop="6dp"
        android:paddingEnd="6dp"
        android:paddingStart="6dp"
        android:adjustViewBounds="true"
        android:scaleType="fitCenter" />

    <org.thoughtcrime.securesms.components.emoji.AsciiEmojiView
        android:id="@+id/emoji_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="6dp"
        android:paddingEnd="6dp"
        android:paddingStart="6dp"
        android:visibility="gone"/>

    <ImageView
        android:id="@+id/emoji_variation_hint"
        android:layout_width="7dp"
        android:layout_height="7dp"
        android:layout_gravity="bottom|right|end"
        app:srcCompat="@drawable/triangle_bottom_right_corner"
        android:tint="@color/core_grey_25"/>

</FrameLayout>