session-android/res/layout/emoji_drawer.xml

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

<org.thoughtcrime.securesms.components.KeyboardAwareLinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
                                                                 android:id="@+id/container"
                                                                 android:orientation="vertical"
                                                                 android:layout_width="match_parent"
                                                                 android:layout_height="match_parent">

    <LinearLayout android:background="#ff333333"
                  android:orientation="horizontal"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content">

        <com.astuetz.PagerSlidingTabStrip android:id="@+id/tabs"
                                          android:layout_weight="1"
                                          android:layout_width="0dp"
                                          android:layout_height="45dp" />

        <ImageButton android:id="@+id/backspace"
                     android:src="@drawable/ic_emoji_backspace"
                     android:background="@color/emoji_tab_underline"
                     android:paddingLeft="@dimen/emoji_drawer_left_right_padding"
                     android:paddingRight="@dimen/emoji_drawer_left_right_padding"
                     android:layout_width="wrap_content"
                     android:layout_height="match_parent" />

    </LinearLayout>

    <android.support.v4.view.ViewPager android:id="@+id/emoji_pager"
                                       android:visibility="visible"
                                       android:layout_width="match_parent"
                                       android:layout_height="match_parent"
                                       android:background="#ff333333" />

</org.thoughtcrime.securesms.components.KeyboardAwareLinearLayout>