Android material flat button v7 compat

btn_flat_compat___v11.xml

<?xml version="1.0" encoding="utf-8"?>
<Button xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/btn_flat"
    style="?android:attr/borderlessButtonStyle"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:maxLines="1"
    android:text="btn_flat"
    android:textColor="@color/colorAccent"
    android:textSize="18sp"
    tools:ignore="HardcodedText" />

btn_flat_compat_v7.xml

<?xml version="1.0" encoding="utf-8"?>
<Button xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/btn_flat"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="4dp"
    android:layout_marginEnd="4dp"
    android:layout_marginRight="4dp"
    android:background="?attr/selectableItemBackground"
    android:maxLines="1"
    android:text="btn_flat"
    android:textColor="@color/colorAccent"
    android:textSize="18sp"
    tools:ignore="HardcodedText" />