removing the shadow or blank space form AppBarLayout +Toolbar

Question

Updated :Its not duplicate question

I tried many solution for remove blank ,margin or space or shadow from left and right side but its not work for me.

Here is my xml code

<?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:background="@color/backgroundColor"
    tools:context=".activities.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="?android:attr/actionBarSize"
            android:contentInsetEnd="0dp"
            android:contentInsetLeft="0dp"
            android:contentInsetRight="0dp"
            android:contentInsetStart="0dp"
            android:supportsRtl="false"
            app:contentInsetEnd="0dp"
            app:contentInsetLeft="0dp"
            app:contentInsetRight="0dp"
            app:contentInsetStart="0dp"
            app:popupTheme="@style/AppTheme.PopupOverlay">

            <include layout="@layout/header_one_layout" />
        </android.support.v7.widget.Toolbar>
    </android.support.design.widget.AppBarLayout></android.support.design.widget.CoordinatorLayout>

and i also tried below solution

Toolbar toolbar;
    toolbar = (Toolbar) findViewById(R.id.toolbar);
    toolbar.setPadding(0, 0, 0, 0);


    toolbar.setContentInsetsAbsolute(0, 0); //padding programmatically
    setSupportActionBar(toolbar);

I want to put shadow or elevation in bottom so i'm not use app:elevation="0dp"

any help will appreciate , thank you in advance.