java/com/android/incallui/theme/res/values/styles.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2013 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>
  <style name="Theme.InCallScreen" parent="@style/Dialer.ThemeBase.NoActionBar">
    <item name="android:statusBarColor">@android:color/transparent</item>
    <item name="android:navigationBarColor">@android:color/transparent</item>
    <item name="android:windowDrawsSystemBarBackgrounds">true</item>

    <item name="dialpad_key_button_touch_tint">?attr/colorPrimary20pct</item>
    <item name="dialpad_style">@style/InCallDialpad</item>
    <item name="android:windowAnimationStyle">@null</item>

    <item name="android:windowBackground">?android:attr/colorBackground</item>

  </style>

  <style name="Theme.InCallScreen.ManageConference" parent="Dialer.ThemeBase.ActionBar">
  </style>

  <style name="InCallDialpad" parent="Dialpad.Themed">
    <item name="dialpad_key_number_margin_bottom">
      @dimen/incall_dialpad_key_number_margin_bottom
    </item>
    <item name="dialpad_digits_adjustable_text_size">
      @dimen/incall_dialpad_digits_adjustable_text_size
    </item>
    <item name="dialpad_digits_adjustable_height">
      @dimen/incall_dialpad_digits_adjustable_height
    </item>
    <item name="dialpad_key_letters_size_for_dual_alphabets">
      @dimen/incall_dialpad_key_letters_size_for_dual_alphabets
    </item>
    <item name="dialpad_key_letters_size_for_single_alphabet">
      @dimen/incall_dialpad_key_letters_size_for_single_alphabet
    </item>
    <item name="dialpad_key_numbers_size">
      @dimen/incall_dialpad_key_numbers_size
    </item>
    <item name="dialpad_end_key_spacing">
      @dimen/incall_end_call_spacing
    </item>
    <item name="dialpad_elevation">10dp</item>
  </style>

  <style name="AfterCallNotificationTheme" parent="Dialer.ThemeBase.NoActionBar">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:colorBackgroundCacheHint">@null</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowAnimationStyle">@android:style/Animation</item>
  </style>

  <style name="AfterCallDialogStyle" parent="@android:style/Theme.Material.Light.Dialog">
    <!-- This colorAccent is to style text in the dialogs -->
    <item name="android:colorAccent">?android:attr/colorPrimary</item>
  </style>

  <style name="Theme.Incall.DialogHolder" parent="Theme.AppCompat.Translucent">
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowActivityTransitions">false</item>

    <item name="android:statusBarColor">@android:color/transparent</item>
    <item name="android:navigationBarColor">@android:color/transparent</item>
    <item name="android:windowDrawsSystemBarBackgrounds">true</item>
  </style>

</resources>