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

<?xml version="1.0" encoding="utf-8"?>
<org.thoughtcrime.securesms.components.BoldSelectionTabItem xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <TextView
        android:id="@android:id/text1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:alpha="1"
        android:gravity="center"
        android:maxLines="2"
        android:textAppearance="@style/TextAppearance.Signal.Body2"
        android:textColor="@color/signal_text_secondary"
        tools:text="Media" />

    <TextView
        android:id="@+id/text1_bold"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:alpha="0"
        android:fontFamily="sans-serif-medium"
        android:gravity="center"
        android:maxLines="2"
        android:textAppearance="@style/TextAppearance.Signal.Body2"
        android:textColor="@color/signal_text_primary"
        tools:text="Media" />

</org.thoughtcrime.securesms.components.BoldSelectionTabItem>