Briar/briar-android/res/drawable/message_sent.xml

<vector android:alpha="0.56" android:height="16dp"
	android:viewportHeight="24.0" android:viewportWidth="24.0"
	android:width="16dp" xmlns:android="http://schemas.android.com/apk/res/android">
	<path android:fillColor="#FF000000" android:pathData="M9,16.17L4.83,12l-1.42,1.41L9,19 21,7l-1.41,-1.41z"/>
</vector>