How to remove full screen mode in android app

I am new in android app development I didn't declare anything for full screen mode still it asks in bottom of my application during runtime for full screen mode only for device with small screen like redmi 6A Here is output

Its just a demo app to ask for permission like call , contacts etc it works fine without crashing just i want to remove that option for full screen from bottom of the screen

would really be great full if anyone can guide Thanks in advance

UPDATE permission_layout.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.android.dialer.PermissionActivity">

<LinearLayout
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true">






</LinearLayout>

</RelativeLayout>