jimu-decompiled/resources/res/layout/messenger_button_send_blue_round.xml

<?xml version="1.0" encoding="utf-8"?>
<Button xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/messenger_send_button"
    android:background="@drawable/messenger_button_blue_bg_round"
    android:layout_width="58dp"
    android:layout_height="59dp"/>