ring-android/app/src/main/res/menu/ac_call.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/menuitem_chat"
        app:showAsAction="ifRoom"
        android:icon="@drawable/ic_chat_white_24dp"
        android:title="@string/ab_action_chat"/>

    <item
        android:id="@+id/menuitem_speaker"
        app:showAsAction="always"
        android:icon="@drawable/ic_speaker_phone_white_24dp"
        android:title="@string/ab_action_speakerphone"
        android:checked="false"
        android:checkable="true" />

    <item
        android:id="@+id/menuitem_camera_flip"
        app:showAsAction="always"
        android:icon="@drawable/ic_camera_front_white_24dp"
        android:title="@string/ab_action_flipcamera" />

    <item
        android:id="@+id/menuitem_addcontact"
        app:showAsAction="ifRoom"
        android:icon="@drawable/ic_person_add_white_24dp"
        android:title="@string/ab_action_contact_add"/>

    <item
        android:id="@+id/menuitem_dialpad"
        app:showAsAction="ifRoom"
        android:icon="@drawable/ic_dialpad_white_24dp"
        android:title="@string/dial_numeric_pad"/>
</menu>