android_frameworks_base/packages/SystemUI/res/values-sw400dp/dimens.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2014 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
  -->
<resources>

    <!-- The width of the view containing navigation buttons -->
    <dimen name="navigation_key_width">80dip</dimen>

    <!-- The padding on the side of the navigation bar. Must be greater than or equal to
         navigation_extra_key_width -->
    <dimen name="navigation_side_padding">50dp</dimen>

    <!-- Screen pinning request padding on side of icons
         (makes the width match the nav bar)-->
    <dimen name="screen_pinning_request_nav_side_padding">7dp</dimen>
    <!-- Screen pinning request side views to match nav bar
         navigation_side_padding - 3 / 2 * (screen_pinning_request_button_width
                                                - navigation_key_width) -->
    <dimen name="screen_pinning_request_side_width">44dp</dimen>

</resources>