session-android/res/layout/recipients_panel.xml

<?xml version="1.0" encoding="utf-8"?>

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/recipients_panel"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingTop="5dip"
        android:paddingBottom="5dip"
        android:paddingLeft="5dip"
        android:paddingRight="5dip"
        android:background="@drawable/white_background"
        android:orientation="vertical" >

        <org.thoughtcrime.securesms.contacts.RecipientsEditor android:id="@+id/recipients_text"
           android:layout_height="wrap_content"
            android:capitalize="sentences"
            android:autoText="true"
            android:singleLine="true"
            android:hint="To"
            android:paddingRight="45dip"
            android:layout_width="fill_parent"/>

        <ImageButton android:id="@+id/contacts_button"
                     android:background="#00000000"
                     android:layout_width="40dip"
                     android:layout_height="35dip"
                     android:layout_marginRight="5dip"
                     android:layout_marginTop="4dip"
                     android:src="@drawable/ic_menu_add_field_holo_light"
                     android:layout_alignRight="@id/recipients_text"
                     android:maxWidth="32dip"
                     android:maxHeight="32dip" />

    </RelativeLayout>