car_product/car_ui_portrait/rro/CarUiPortraitNotificationRRO/res/values/dimens.xml

<?xml version="1.0" encoding="utf-8" ?>
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  ~ Copyright (C) 2021 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
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  ~      http://www.apache.org/licenses/LICENSE-2.0
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  ~ distributed under the License is distributed on an "AS IS" BASIS,
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  ~ See the License for the specific language governing permissions and
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<resources>
    <!-- Horizontal margin for HUNs -->
    <dimen name="notification_headsup_card_margin_horizontal">0dp</dimen>
    <dimen name="car_notification_card_inner_top_margin">8dp</dimen>

    <!-- Card View -->
    <dimen name="card_start_margin">16dp</dimen>
    <dimen name="card_end_margin">8dp</dimen>
    <dimen name="card_body_margin_bottom">8dp</dimen>
    <dimen name="card_body_margin_start">16dp</dimen>
    <dimen name="card_header_margin_bottom">8dp</dimen>
    <dimen name="notification_card_radius">24dp</dimen>
    <dimen name="headsup_notification_bottom_margin">160dp</dimen>

    <dimen name="play_arrow_width">28dp</dimen>
    <dimen name="play_arrow_height">36dp</dimen>
    <dimen name="reply_icon_height">28dp</dimen>
    <dimen name="reply_icon_width">36dp</dimen>
    <dimen name="mute_icon_height">40dp</dimen>
    <dimen name="mute_icon_width">34dp</dimen>

    <!-- Icons -->
    <dimen name="notification_touch_target_size">120dp</dimen>
    <dimen name="body_big_icon_margin">8dp</dimen>

    <!-- Action View -->
    <dimen name="action_button_height">88dp</dimen>
    <dimen name="action_button_radius">24dp</dimen>
    <dimen name="action_view_left_margin">8dp</dimen>
    <dimen name="action_view_right_margin">8dp</dimen>
    <dimen name="action_button_padding_bottom">8dp</dimen>

    <dimen name="card_min_bottom_padding">8dp</dimen>
    <dimen name="card_min_top_padding">8dp</dimen>
</resources>