Preferências por cima da toolbar

Olá

Estou com um problema na minha app que ao usar as preferências o layout das preferências está por cima da minha toolbar

Este é o código

'<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
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:id=”@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer=“start”>

    <include
        android:id="@+id/app_bar"
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />


    <FrameLayout
        android:id="@+id/content"
        android:layout_below="@id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </FrameLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

</android.support.v4.widget.DrawerLayout>

`
Que como se vê inclui este xml´

`<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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="match_parent"
android:layout_height=“match_parent"
android:fitsSystemWindows=“true"
tools:context=”.MainActivity”>

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:minHeight="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:navigationIcon="?attr/homeAsUpIndicator"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include
        layout="@layout/content_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/toolbar"
        android:layout_marginTop="?attr/actionBarSize" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        android:src="@android:drawable/ic_partial_secure" />

</android.support.design.widget.CoordinatorLayout>'

e este inclui este

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

    <TextView
        android:id="@+id/location"
        android:paddingTop="50dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</RelativeLayout>'

As minhas prefrencias estão num ficheiro xml na pasta xml

<?xml version="1.0" encoding="utf-8"?> <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"> <PreferenceCategory android:summary="Username and password information" android:title="Informações de Login"> <EditTextPreference android:key="username" android:summary="Introduzir username" android:title="Username" /> <EditTextPreference android:key="password" android:summary="Introduzir password" android:title="Password" /> </PreferenceCategory> <PreferenceCategory android:summary="sessao" android:title="Definições"> <Preference android:key="@string/myCoolButton" android:summary="Mude aqui" android:title="Mudar a password na BD" /> <CheckBoxPreference android:key="checkBox" android:summary="On/Off" android:title="Manter Sessão" /> </PreferenceCategory> </PreferenceScreen>

E o meu layout está assim

Imagem