res/layout/details_overview.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2016 The Android Open Source Project
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~      http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<!-- This layout file is copied from Leanback library and used to override the original layout.
     Be cautious to change this layout to prevent weird UI behavior -->
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:lb="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingStart="@dimen/lb_details_overview_margin_start"
    android:paddingEnd="@dimen/lb_details_overview_margin_end"
    android:paddingBottom="@dimen/lb_details_overview_margin_bottom"
    android:clipToPadding="false"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:descendantFocusability="afterDescendants">

    <!--  Used for dimming -->
    <FrameLayout android:id="@+id/details_frame"
        android:layout_width="match_parent"
        android:layout_height="@dimen/lb_details_overview_height_large"
        android:foreground="#ffffff"
        android:elevation="@dimen/lb_details_overview_z">

        <!-- Background is applied to this inner layout -->
        <LinearLayout android:id="@+id/details_overview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">

            <ImageView android:id="@+id/details_overview_image"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:adjustViewBounds="true"
                android:scaleType="fitStart" />

            <LinearLayout android:id="@+id/details_overview_right_panel"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:paddingBottom="@dimen/lb_details_overview_description_margin_bottom"
                android:orientation="vertical" >

                <!-- layout_marginStart and layout_marginEnd are overridden -->
                <android.support.v17.leanback.widget.NonOverlappingFrameLayout
                    android:id="@+id/details_overview_description"
                    android:layout_width="match_parent"
                    android:layout_height="0dp"
                    android:layout_weight="1"
                    android:gravity="top"
                    android:layout_marginStart="@dimen/dvr_details_overview_description_margin_start"
                    android:layout_marginEnd="@dimen/dvr_details_overview_description_margin_end"
                    android:paddingTop="@dimen/lb_details_overview_description_margin_top"
                    android:clipToPadding="false"
                    android:clipChildren="false" />

                <!-- horizontalSpacing is defined as @dimen/lb_details_overview_action_items_spacing
                     in newer versions of Leanback Library than LC uses. -->
                <android.support.v17.leanback.widget.HorizontalGridView
                    android:id="@+id/details_overview_actions"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:clipChildren="false"
                    android:clipToPadding="false"
                    android:focusable="true"
                    android:focusableInTouchMode="true"
                    android:paddingStart="@dimen/lb_details_overview_description_margin_start"
                    android:paddingEnd="@dimen/lb_details_overview_description_margin_end"
                    android:horizontalSpacing="16dp"
                    lb:rowHeight="@dimen/lb_details_overview_actions_height" />

            </LinearLayout>
        </LinearLayout>
    </FrameLayout>
</FrameLayout>