Signal-Android/app/src/main/res/layout/button_strip_item_view.xml

<?xml version="1.0" encoding="utf-8"?>
<merge 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="wrap_content"
    android:layout_height="wrap_content"
    tools:parentTag="androidx.constraintlayout.widget.ConstraintLayout">

    <androidx.appcompat.widget.AppCompatImageView
        android:id="@+id/icon"
        style="@style/Signal.Widget.ImageView.ActionButton"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:srcCompat="@drawable/ic_bell_24" />

    <TextView
        android:id="@+id/label"
        style="@style/Signal.Widget.TextView.ActionButton"
        app:layout_constraintEnd_toEndOf="@id/icon"
        app:layout_constraintStart_toStartOf="@id/icon"
        app:layout_constraintTop_toBottomOf="@id/icon"
        tools:text="@string/ConversationSettingsFragment__mute" />

</merge>