SystemUIGoogle/res/layout/assist_transcription.xml

<?xml version="1.0" encoding="utf-8"?>
<com.google.android.systemui.assist.uihints.TranscriptionView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:ellipsize="none"
    android:fontFamily="google-sans-medium"
    android:gravity="start|bottom|center"
    android:layout_gravity="start|bottom|center"
    android:layout_marginBottom="@dimen/transcription_space_bottom_margin"
    android:singleLine="true"
    android:textColor="@color/transcription_text_dark"
    android:textSize="@dimen/transcription_text_size"
    android:visibility="gone" />